BMW Cooling System Parts & Accessories for BMW 3 Series E90 (2006-2011)

Water Pump And Thermostat Kit - BMW N52 3.0L

T#:17073598

Part#: 11537549476KT

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05-03-2026

$ 318.83 USD

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Includes everything you may need to replace your water pump and thermostat.

BMW N54 N55 S55 Mosselman Thermostat Installation Kit

T#:4799665

Part#: THERMINSTALLKT

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This product was last offered at the strikethrough price on
06-15-2026

$ 21.64 USD

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BMW N54 N55 S55 Mosselman Thermostat Installation Kit is designed to ensure a seamless installation of the Mosselman thermostat on BMW engines. This comprehensive kit from Turner Motorsport includes all necessary gaskets and components, guaranteeing a reliable and precise installation for optimal engine performance.

Complete Kit: Includes all essential gaskets and components required for a hassle-free thermostat installation.
Optimal Performance: Ensures proper installation of the Mosselman thermostat, leading to improved engine cooling efficiency and performance.
High-Quality Components: Gaskets and parts are manufactured to meet high standards of durability and reliability.
Precision Fit: Engineered to match OEM specifications, providing a perfect fit and reliable performance.
Ease of Installation: All necessary parts are included, simplifying the installation process and reducing the need for additional purchases.

Upgrade your BMW's cooling system with the Mosselman Thermostat Installation Kit from Turner Motorsport, ensuring a top-quality, reliable setup for your engine.

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Water Pump And Thermostat Kit

T#:5376274

Part#: 11517586925TKT

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Sale - Save 25% $ 448.99

This product was last offered at the strikethrough price on
05-03-2026

$ 337.56 USD

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$ 448.99

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$ 337.56 USD

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Everything you need to replace your water pump and thermostat. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Kit includes: Mahle-Behr thermostat Water pump Genuine BMW coolant thermostat to water pump hose Mounting hardware required for both the thermostat and water pump

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N54 Billet 90 Degree Coolant Tank Fitting

T#:12184492

Part#: VTT-COOLANT-90-1

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$ 37.99 USD

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Enhance the flexibility of your BMW's coolant system with the Vargas Turbo Technologies 90-Degree Coolant Tank Fitting. Ideal for applications such as single turbo setups or forward-facing intake manifolds, this fitting provides extra clearance and versatile hose routing options.

Key Benefits:

Allows hose to run straight down, increasing clearance
Made of durable 6061-T6 aluminum for long-lasting performance
Anodized black finish for enhanced durability and corrosion resistance
Includes fitting and clamp for easy installation

Upgrade your BMW's coolant system with the Vargas Turbo Technologies 90-Degree Coolant Tank Fitting for improved performance and versatility.

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Cooling System Hose Kit

T#:24212306

Part#: E9XN52CHKT

Ships in 3 Business Days

Sale - Save 8% $ 189.99

This product was last offered at the strikethrough price on
05-03-2026

$ 175.64 USD

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$ 175.64 USD

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Replace your cooling system hoses with this complete kit including coolant

Ultimate Water Pump And Thermostat Kit - N54

T#:5376299

Part#: 11517632426TMSKT

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Sale - Save 13% $ 987.99

This product was last offered at the strikethrough price on
03-31-2026

$ 855.23 USD

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Add strength to your cooling system and replace your water pump The secret of any reliable performance car is a rock-solid cooling system. Unfortunately, the N54's stock cooling system has several shortcomings that get in the way of reliable, repeatable, dependable performance. Turner Motorsport has spent years behind the wheel of modified N54-powered BMWs, and we've figured out what it takes to keep your N54 cool and happy. Using a combination of in-house designed parts and carefully-selected aftermarket components, we've put together an all-inclusive package that will allow you to replace your water pump and beef up your cooling system at the same time. Here's what's included: New water pump with replacement screws New thermostat Billet thermostat hose adapter (a great replacement for the stock, crack-prone plastic part!) Silicone coolant outlet hose Aluminized silicone water pump hose (aluminized for heat resistance to stay cool!) Heavy Duty aluminum coolant bleed screw (replace the strip-prone plastic screw!) New hose clamps 1 gallon of Genuine BMW coolant (just add distilled water at your desired ratio) Red Line Water Wetter (trust us, this stuff works - we've been running it for years!)Add strength to your cooling system and replace your water pump The secret of any reliable performance car is a rock-solid cooling system. Unfortunately, the N54's stock cooling system has several shortcomings that get in the way of reliable, repeatable, dependable performance. Turner Motorsport has spent years behind the wheel of modified N54-powered BMWs, and we've figured out what it takes to keep your N54 cool and happy. Using a combination of in-house designed parts and carefully-selected aftermarket components, we've put together an all-inclusive package that will allow you to replace your water pump and beef up your cooling system at the same time. Here's what's included: New water pump with replacement screws New thermostat Billet thermostat hose adapter (a great replacement for the stock, crack-prone plastic part!) Silicone coolant outlet hose Aluminized silicone water pump hose (aluminized for heat resistance to stay cool!) Heavy Duty aluminum coolant bleed screw (replace the strip-prone plastic screw!) New hose clamps 1 gallon of Genuine BMW coolant (just add distilled water at your desired ratio) Red Line Water Wetter (trust us, this stuff works - we've been running it for years!)

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VTT Billet Coolant Reservoir Cap - Anodized Blue - Most BMWs 2006+ (E...

T#:7530036

Part#: COOLANTCAPBLUE

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$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Thermostat Replacement Kit - E82 E9X E84 E70 E71 With N55 Engines ...

T#:554075

Part#: 11537601158KT2

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This product was last offered at the strikethrough price on
05-03-2026

$ 81.44 USD

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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.

Kit includes

Wahler Thermostat
1 liter of Coolant

This item fits the following BMWs:
2008-2013  E82 BMW  135i 135is 1M Coupe
2013+  E84 BMW  X1 xDrive35i
2011  E90 BMW  335i 335xi 335i xDrive - Sedan
2011-2013  E92 BMW  335i 335xi 335i xDrive - Coupe
2011-2013  E93 BMW  335i Convertible
2011-2013  E70 BMW  X5 xDrive35i
2011-2013  E71 BMW  X6 xDrive35i

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VTT Billet Coolant Reservoir Cap - Anodized Red - Most BMWs 2006+ (E/...

T#:7530034

Part#: COOLANTCAPRED

Ships in 1 Business Day

$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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VTT Compete N54 Coolant Hose Kit - E8X, E9X N54

T#:590227

Part#: VTT-N54-COOLANT-

Ships in 10 Business Days

$ 469.99 USD

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A complete upgrade to the weak factory hoses.

Performance Water Pump And Thermostat Kit

T#:15710799

Part#: 11517632426-KT

Ships in 3 Business Days

Sale - Save 20% $ 514.99

This product was last offered at the strikethrough price on
05-03-2026

$ 410.34 USD

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$ 514.99

This product was last offered at the strikethrough price on
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$ 410.34 USD

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The stock thermostat is designed to open at 97C. This leaves your engine running fairly hot, and running for quite awhile before your thermostat will begin operation. With the Mishimoto Racing thermostat, the activation temperature becomes 74C. That's 23C cooler, meaning you can rest easy knowing your engine will stay cooler to help avoid all the problems that can be associated with an engine running hot. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. This kit provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Mishimoto Racing thermostat Bavarian Autosport water pump Genuine BMW coolant Mounting hardware required for both the thermostat and water pump

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Water Pump And Thermostat Kit - E90 335d E70 X5 35d

T#:554062

Part#: 11517801063KT2

In Stock

Sale - Save 6% $ 187.99

This product was last offered at the strikethrough price on
05-03-2026

$ 176.63 USD

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$ 176.63 USD

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The water pumps BMW's should be serviced near 80,000 miles and may become an issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road.

Kit includes:

Facet thermostat
Graf water pump
Vaico coolant
Mounting hardware required for the water pump

This item fits the following BMWs:
2009+ E90 BMW 335d
2009+ E70 BMW X5 xDrive35d

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VTT Billet / Silicone Full Coolant Hose Kit - Red - BMW E82/E88 E9X N...

T#:22987117

Part#: VTT-N54-COOLANTR

Ships in 2 Business Days

$ 464.99 USD

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VTT is proud to announce our N54 Billet/Silicone coolant hose upgrade kit! The factory plastic coolant connectors are prone to breaking over time, and the hoses are just your standard run of the mill coolant hose. We wanted to provide an upgrade to both areas. What we came up with is Billet 6061-T6 connectors anodized black for corrosion resistance, and 6 ply silicone molded silicone hoses in the factory shapes. Full hose kit includes: Upper Radiator hose Lower Radiator hose Cylinder head outlet hose (Mickey Mouse hose, this hose is notorious for breaking when removed) Upper vent hose (this hose is also notorious for breaking as stock the center is plastic that crumbles when moved) Water pump inlet hose (Horse Shoe hose)

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E9X 325i/330i 6MT Cooling Overhaul Package

T#:340246

Part#: TMS214376

In Stock

Sale - Save 24% $ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.55 USD

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Sale - Save 24%

$ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.55 USD

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This cooling overhaul will cover just about everything you could replace on the 325/330's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 325/330. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, cooling hoses, and the BMW antifreeze. This package fits 325/330 with N52 engine and manual transmission.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Coolant Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 325/330 water hoses during this job (see diagram):

17127531579, upper radiator hose (A)
17127531581, lower radiator hose (B)
11537552396, water pump to engine �
11537545890, thermostat to cylinder head (includes new o-ring) (D)
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 325/330 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the E90 325/330 - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and a manual transmission:
2006-2006 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2006 E91 BMW 325xi - Wagon

Click on the options for your kit below and then click "update price" for your kit total.

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BMW Water Pump And Thermostat Kit - N54

T#:378340

Part#: 11517632426KT3

In Stock

Sale - Save 13% $ 743.03

This product was last offered at the strikethrough price on
03-31-2026

$ 645.99 USD

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$ 743.03

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The water pumps in BMW N54 models are known for failure near 80,000 miles. This is a very common issue that often times leaves the owner stranded. This kit provides a single stop for the water pump and thermostat replacement to save the search and get you back on the road.

Included in this kit:

Thermostat
Water pump
Genuine BMW coolant
Mounting hardware required for both the thermostat and water pump

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E9X 325i/330i Auto Cooling Overhaul Package

T#:340245

Part#: TMS214380

In Stock

Sale - Save 24% $ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.55 USD

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Sale - Save 24%

$ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.55 USD

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This cooling overhaul will cover just about everything you could replace on the 325/330's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 325/330i. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 325/330 cooling hoses, and the BMW antifreeze. This package fits 325i/330i/xi with N52 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 325/330 water hoses during this job (see diagram):

17127531579, upper radiator hose
17127531581, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 325/330 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the E90 325/330 - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and an auto transmission:
2006-2006 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2006 E91 BMW 325xi - Wagon

Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

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Basic Cooling System Service Kit - E9X 328i/xi w/ Manual Transmission...

T#:557224

Part#: E9X328MBCKT

In Stock

Sale - Save 5% $ 674.60

This product was last offered at the strikethrough price on
04-17-2026

$ 639.87 USD

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$ 639.87 USD

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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Basic Cooling System Service Kit - E82/88 E9X N54 3.0L w/ Auto or DCT...

For vehicles with automatic or DCT transmissions

T#:557234

Part#: E8XE9XN54BCKT

Back Ordered

$ 1,036.99

This product was last offered at the strikethrough price on
04-06-2026

$ 996.99 USD

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$ 996.99 USD

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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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E82 128i, E9X 328i Auto Cooling Overhaul Package

T#:340251

Part#: TMS214378

Ships in 4 Business Days

Sale - Save 2% $ 621.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 611.54 USD

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Sale - Save 2%

$ 621.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 611.54 USD

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This cooling overhaul will cover just about everything you could replace on the 328's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 328i. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 328 cooling hoses, and the BMW antifreeze. This package fits 328i/328xi with N52 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 water hoses during this job (see diagram):

17127531579, upper radiator hose
17127564478, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and an auto transmission:
2008-2012 E82 BMW 128i
2007-2011 E90 BMW 328i 328xi 328i xDrive - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive - Coupe
2007-2013 E93 BMW 328i - Convertible
Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

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Water Pump and Thermostat Package - N51/N52 Engine - E82 128i, E9X 32...

T#:42873693

Part#: TMS206099GKT

In Stock

$ 729.35 USD

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Our water pump/thermostat overhaul includes:

Electric Water Pump
Aluminum mounting screws for water pump
Thermostat
Connecting hose from thermostat to water pump
Hose clamps

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Basic Cooling System Service Kit - E9X 328i/xi N52 3.0L w/ Auto Trans...

T#:557241

Part#: E9X328BCKT

In Stock

Sale - Save 5% $ 711.99

This product was last offered at the strikethrough price on
03-24-2026

$ 673.03 USD

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Sale - Save 5%

$ 711.99

This product was last offered at the strikethrough price on
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$ 673.03 USD

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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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E82 128i N51 SULEV, E9X 328i N51 SULEV Auto Cooling Overhaul Package ...

T#:340253

Part#: TMS215325

In Stock

Sale - Save 7% $ 1,280.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 1,194.54 USD

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Sale - Save 7%

$ 1,280.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 1,194.54 USD

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This cooling overhaul will cover just about everything you could replace on the 328 SULEV's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N51 328i SULEV. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 328 SULEV cooling hoses, and the BMW antifreeze. This package fits 128i/328i SULEV with N51 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N51 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 SULEV water hoses during this job (see diagram):

17127531579, upper radiator hose
17127531581, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 SULEV is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the 328 SULEV - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N51 engine and an auto transmission:
2008-2012 E82 BMW 128i SULEV
2007-2011 E90 BMW 328i 328xi 328i xDrive SULEV - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive SULEV - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive SULEV - Coupe
2007-2013 E93 BMW 328i SULEV - Convertible
Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

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E82 128i, E9X 328i 6MT Cooling Overhaul Package

T#:340252

Part#: TMS214377

In Stock at Vendor

Sale - Save 9% $ 704.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 639.11 USD

Add to Wish List

Sale - Save 9%

$ 704.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 639.11 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 328's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 328i. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, cooling hoses, and the BMW antifreeze. This package fits 328i/328xi with N52 engine and manual transmission.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 water hoses during this job (see diagram):

17127531579, upper radiator hose (A)
17127564478, lower radiator hose (B)
11537552396, water pump to engine ©
11537545890, thermostat to cylinder head (includes new o-ring) (D)
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and a manual transmission:
2008-2012 E82 BMW 128i
2007-2011 E90 BMW 328i 328xi 328i xDrive - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive - Coupe
2007-2013 E93 BMW 328i - Convertible

Click on the options for your kit below and then click "update price" for your kit total.

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Water Pump And Thermostat Kit - E9X M3

T#:554059

Part#: 11517838201KT4

Ships in 1 Business Day

Sale - Save 29% $ 285.99

This product was last offered at the strikethrough price on
04-07-2026

$ 202.76 USD

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Sale - Save 29%

$ 285.99

This product was last offered at the strikethrough price on
04-07-2026

$ 202.76 USD

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The water pumps in BMW's should be serviced near 80,000 miles and may become an issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road.

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Thermostat Replacement Kit - E9X M3

T#:554084

Part#: 11537836155KT2

Ships in 1 Business Day

Sale - Save 14% $ 99.99

This product was last offered at the strikethrough price on
06-16-2026

$ 86.07 USD

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Qty

Sale - Save 14%

$ 99.99

This product was last offered at the strikethrough price on
06-16-2026

$ 86.07 USD

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When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

VTT Billet Coolant Reservoir Cap - Anodized Clear - Most BMWs 2006+ (...

This coolant cap retains ALL of the factory provisions by simply allowing you to snap t...

T#:7530035

Part#: COOLANTCAPRAW

Back Ordered

$ 78.99 USD

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$ 78.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Cooling System overhaul Kit - E9X 328i/xi (W/ Automatic Trans) ...

T#:554106

Part#: 17137607482KT8

In Stock

Sale - Save 4% $ 1,075.99

This product was last offered at the strikethrough price on
04-06-2026

$ 1,031.91 USD

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Sale - Save 4%

$ 1,075.99

This product was last offered at the strikethrough price on
04-06-2026

$ 1,031.91 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the E90/92/93 328i/328xi with the N52 engine.

A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts.

This kit fits the following BMWs:

2007-2012 E90/92/93 328i, 328xi with Automatic Transmission

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VTT N54 Both Raditors Hoses Only

T#:590230

Part#: VTT-N54-COOLANT4

Ships in 10 Business Days

$ 439.99 USD

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$ 439.99 USD

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Vargas Billet Cylinder Head Outlet Adapter - Black - BMW N54/N55 ...

T#:51918879

Part#: VTT-COOLADBLK

Ships in 10 Business Days

$ 31.99 USD

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$ 31.99 USD

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The Vargas Billet Cylinder Head Outlet Adapter is the definitive solution for one of the most common failure points on the BMW N54 and N55 engines.

Vargas Upgraded Silicone Coolant Hose Kit - Black - BMW N54

T#:52129740

Part#: N54COOLFBO

Ships in 10 Business Days

$ 354.99 USD

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$ 354.99 USD

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The VTT N54 Full Coolant Hose Kit replaces your entire aging coolant hose network with high-performance silicone alternatives.

Vargas Cylinder Head Outlet Coolant Adapter - BMW N54

T#:51813338

Part#: VTT-N54-CAO

Ships in 10 Business Days

$ 31.99 USD

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$ 31.99 USD

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Engineered for high-performance BMW builds, the Vargas Coolant Adapter replaces the weak factory plastic neck located at the front of the cylinder head.

Vargas Upgraded Silicone Cylinder Head Outlet Hose - Black - BMW N54 ...

T#:52129741

Part#: N54COOLHBO

Ships in 10 Business Days

$ 74.99 USD

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$ 74.99 USD

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The VTT N54 Billet/Silicone Cylinder Head Outlet Hose, commonly referred to as the "Mickey Mouse" hose, is a vital upgrade for the BMW N54 engine.

Vargas Upgraded Silicone Cylinder Head Outlet Adapter - Black - BMW N...

T#:52129739

Part#: VTTN54CLADOEM

Ships in 10 Business Days

$ 19.99 USD

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$ 19.99 USD

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Address the weakest link in your N54 cooling system with the Vargas Turbo Technologies Billet Cylinder Head Outlet Adapter.

Vargas Heater Return Pipe Hose Upgrade - Black - BMW E9X M3

T#:52164954

Part#: S65COOLHEATBLK

Ships in 10 Business Days

$ 127.99 USD

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$ 127.99 USD

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Upgrade your BMW M3’s engine bay while simultaneously reinforcing your cooling system with the VTT Billet/Silicone Heater Return Pipe Hose.

Vargas Upgraded Silicone Upper Vent Hose - Black - BMW N54 E8X/E9X ...

T#:52164880

Part#: N54CLVTBLKO

Ships in 10 Business Days

$ 54.99 USD

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$ 54.99 USD

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The VTT N54 Upper Vent Hose is a critical upgrade for any BMW enthusiast looking to eliminate the weakest links in their cooling system.

Vargas Billet Cylinder Head Outlet Adapter - Blue - BMW N54/N55 ...

T#:51918881

Part#: VTT-COOLADBLUE

Ships in 10 Business Days

$ 31.99 USD

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$ 31.99 USD

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The Vargas Billet Cylinder Head Outlet Adapter is the definitive solution for one of the most common failure points in BMW N54 and N55 engines.

Vargas Upgraded Silicone Radiator Hose Kit - Black - BMW N54 ...

T#:52129743

Part#: N54COOLRADBLKO

Ships in 10 Business Days

$ 249.99 USD

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$ 249.99 USD

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The VTT Billet/Silicone Radiator Hose Kit is a heavy-duty cooling upgrade designed specifically for the BMW N54 engine.

Vargas Water Pump Vent Hose - Black - BMW E9X M3

T#:52164956

Part#: S65COPUBLK

Ships in 10 Business Days

$ 104.99 USD

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$ 104.99 USD

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Prevent a roadside breakdown with the VTT Billet/Silicone S65 Water Pump Vent Hose, the ultimate maintenance upgrade for your BMW E9X M3.

Vargas Lower Radiator Hose - Black - BMW E9X M3

T#:52164955

Part#: S65COLLOWBLK

Ships in 10 Business Days

$ 179.99 USD

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$ 179.99 USD

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Designed for the S65 V8 engine, the VTT Lower Radiator Hose upgrade addresses the common maintenance headaches associated with aging BMW cooling systems.

Vargas Rear Coolant Plug - BMW N54

T#:51778143

Part#: VTT-N54-RCP

Ships in 10 Business Days

$ 41.99 USD

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$ 41.99 USD

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Engineered for durability and exact fitment, the VTT N54 Rear Coolant Plug is CNC-machined from high-quality 6061-T6 aluminum.

Vargas Upgraded Silicone Lower Radiator Coolant Hose - Black - BMW N5...

T#:52129742

Part#: VTTN54CLOWBLKO

Ships in 10 Business Days

$ 127.99 USD

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$ 127.99 USD

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The VTT Upgraded Silicone Lower Radiator Hose for the N54 engine is the perfect preventive maintenance item for any BMW owner.

Vargas Upgraded Silicone Upper Radiator Hose - Black - BMW N54 E8X/E9...

T#:52164878

Part#: N54CLRADUBLKO

Ships in 10 Business Days

$ 139.99 USD

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$ 139.99 USD

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The Vargas Turbo Technologies (VTT) N54 Upper Radiator Hose is a heavy-duty cooling upgrade designed specifically for high-performance BMW N54 engines.

Vargas Radiator Hose Kit - Black - BMW E9X M3

T#:52164958

Part#: S65RHKBLK

Back Ordered

$ 314.99 USD

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$ 314.99 USD

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The VTT S65 Radiator Hose Kit is the premier cooling system upgrade for the BMW E9X M3.

Vargas Upper Radiator Hose - Black - BMW E9X M3

T#:52164959

Part#: S65COUPRABLK

Ships in 10 Business Days

$ 179.99 USD

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$ 179.99 USD

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The VTT Billet/Silicone Upper Radiator Hose is the only solution on the market that addresses both the hose material and the connector integrity simultaneously.

Vargas Billet Upper Coolant Line Block-Off - BMW N55 & S55 Engines ...

T#:52094575

Part#: VTT-FAB-047

Ships in 10 Business Days

$ 21.99 USD

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$ 21.99 USD

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When building a custom turbo kit, the "VTT-FAB-047" Block-Off Flange is an essential component for managing your BMW's thermal systems.

Vargas Upper Vent Hose - Black - BMW E9X M3

T#:52164960

Part#: S65COUVHBLK

Ships in 10 Business Days

$ 74.99 USD

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$ 74.99 USD

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This VTT kit provides a permanent fix by utilizing heavy-duty silicone and anodized billet aluminum ends.

Vargas Coolant Hose Upgrade Kit - Black - BMW E9X M3

T#:52164951

Part#: S65COOLFULLBLK

Ships in 10 Business Days

$ 524.99 USD

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$ 524.99 USD

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Upgrade your BMW E9X M3’s engine bay and cooling reliability simultaneously with the Vargas Turbo Technologies S65 Billet/Silicone Full Hose Kit.

High Performance Cooling System Upgrade - E9X M3 (up to 04/2008) ...

T#:557321

Part#: E9XM3PCKT2

Ships in 5 Business Days

$ 2,321.15 USD

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$ 2,321.15 USD

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To ensure your BMW keeps cool on the track, we have built out our new High Performance Cooling System Upgrade kits. Featured in this kit is everything you will need to redo your cooling system from top to bottom with OEM components, with select stock components swapped out for the high performance alternative!

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Basic Cooling System Service Kit - E9X M3 S65

T#:557214

Part#: E9XM3BCKT

Ships in 3 Business Days

$ 632.99

This product was last offered at the strikethrough price on
02-27-2026

$ 551.99 USD

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$ 551.99 USD

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To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

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High Performance Cooling System Upgrade - E9X M3 (04/2008+)

T#:557320

Part#: E9XM3PCKT

Ships in 5 Business Days

$ 2,335.08 USD

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$ 2,335.08 USD

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To ensure your BMW keeps cool on the track, we have built out our new High Performance Cooling System Upgrade kits. Featured in this kit is everything you will need to redo your cooling system from top to bottom with OEM components, with select stock components swapped out for the high performance alternative!

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BMW Cooling System Parts & Accessories for BMW 3 Series E90 (2006-2011)

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