BMW Cooling System Parts & Accessories for BMW 1 Series E82 (2008-2013)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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ECS - Corporate Logo
T#:363070
Part#: 003530ECS01A
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Replace the flimsy plastic bleeder screw used in the coolant expansion tank or in one of the cooling system hoses with this high quality, durable, aluminum bleeder screw. The stock plastic screw can deform over time due to heat or even regular use. We have even seen the head of the screw snap off, leaving the threaded body stuck in the expansion tank. This aluminum screw will help to prevent sudden failure of the bleeder screw, which can result in immediate overheating of the car.

ECS Tuning's Aluminum Coolant Bleeder Screw replaces Genuine BMW Part Number 17111712788

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Turner Motorsport - Corporate Logo
T#:21735881
Part#: 053082LA01
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Upgraded or replacement silicone heater hose for our N54 expansion tank relocation kits.

60" silicone performance coolant hose featuring a molded 90-degree bend for installs with space constraints.

Features and benefits:

Constructed of 4-Ply reinforced silicone for improved durability over the failure-prone rubber hoses.
Reduced thermal conductivity
Improved resistance to ozone and UV degradation for improved performance and durability.
Turner branded

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Turner Motorsport - Corporate Logo
T#:12806793
Part#: 008378LA02
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Our Turner Motorsport's full aluminum expansion tank was designed and engineered in house to help with the weak point in your N52/N54 cooling system. The coolant expansion tank goes through heat cycles over and over again from regular driving, it is important that your expansion tank is doing its job to retain coolant to keep your engine operating temperatures down and keep your engine bay clean. Not only is this a major upgrade but also a great maintenance item to replace. Our expansion tank was designed to fit the OEM hoses for an easy install and comes with all the upgraded items you will need for a clean install

If your BMW needs a new expansion tank, make sure this is the last expansion tank you ever need to buy. Our coolant expansion tank has a full aluminum construction and wrinkle black powder coat for durability. Expansion tank kit comes with all the accessories you need to replace your expansion tank once, and never have to worry about it again.

Product Features:

Maintains stock coolant capacity and expansion volume
Designed to maintain OE coolant elevation, preventing air pockets
Baffled tank ensures that air pockets cannot be introduced during aggressive driving and provides accurate coolant level reading
Carefully designed bleed passage prevents the introduction of air as the engine cools
Turner engraved internal fill level
TIG welded 5052 aluminum construction
All bungs are machined to fit factory hose ends
Kit contents:

Turner Aluminum Expansion Tank
Coolant level sensor
Expansion tank cap
Heavy duty bleeder screw
Flared coolant pressure release line
Hardware for installation

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T#:556105
Part#: 024797ECS01
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Some of the biggest issues when owning a BMW can come from cooling system components. Even through years of improvement, the same failure is seen with the plastic fittings and adapters from years of hot to cold temperature fluctuation. The N52/N54/N55/N20 engine sees failure at the plastic cylinder head outlet adapter connecting the cylinder head to the thermostat hose. The stock plastic adapter simply shears off at the end of the barbed fitting, creating a massive coolant leak. The engineering team at ECS Tuning decided a billet aluminum piece was a much better option to contend with the temperature fluctuation. Since other offerings on the market want you to modify your OE hose to be reused, they even developed a silicone replacement hose. These 2 pieces can be purchased separately if you decide to reuse your existing OE hose or in a package kit together for a single click upgrade. Features: Manufactured from billet 6061-T6 with type III anodized for exceptional durability and corrosion resistance. Much stronger part than OEM plastic ​​Will not become brittle and fatigued over time due to thermal cycling. This will prevent the part from breaking during removal and re-installation. Follows OEM form for perfect fitment. Utilizes (and includes) OEM O-ring 11537545278 to ensure a proper seal. Recommended clamp size is 25-40mm
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T#:640062
Part#: 008286LA01
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When it comes to cooling system hose replacement, the "U" shaped hose connecting the water pump to the thermostat is usually the first to fail. A lot of this comes from its close proximity to the hot downpipes, while some of this failure comes from the sharp bends in the hose. 

Why not upgrade when you're due for a replacement? The ECS Tuning silicone hose replacement fixes these issue with two key features in their design. Offering this hose in a much more heat resistant silicone instead of OE rubber and having the hose wrapped in aluminum. The aluminum coating acts as a heat shield to further protect the silicone as well as reducing the temperatures forced on the coolant running through the hose. 

Replaces OE hose #11537545665

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Turner Motorsport - Corporate Logo
T#:568366
Part#: 021942TMS05
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The E9X/ E8X N54 Expansion Tank Wire harness is perfect for those running a relocated coolant reservoir tank. This harness plugs right into the factory connector allowing you to extend the position of the sensor without the need to splice any wires.
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T#:555020
Part#: 025216ECS01
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Upgrade your cooling system with durable silicone hoses that offer extended life and enhanced heat tolerance. Say goodbye to stock limitations and opt for silicone hoses that retain OEM fitment while overcoming typical OEM hose flaws. These hoses are designed to resist deterioration and softening due to coolant heat cycles, ensuring prolonged longevity compared to traditional rubber hoses.

Specifically, this hose connects from the thermostat housing outlet to the front of the cylinder head. Its features include:

  • Inclusive of both upper and lower clamps for easy installation.
  • Crafted from 4-Ply reinforced silicone, ensuring superior durability compared to OE rubber hoses that are prone to failure.
  • Internal layer lined with Flourosilicone for exceptional chemical resistance.
  • Silicone construction provides reduced thermal conductivity, enhanced resistance to ozone, and UV degradation, thereby boosting overall performance and longevity.
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T#:367075
Part#: 013197ECS01A
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Ensure your BMW's cooling system stays in top shape with ECS Tuning's Billet Aluminum Radiator Drain Plug. Designed specifically for late-model 1-Series and 3-Series BMWs, this replacement plug addresses the common issue of weak plastic drain plugs. Constant exposure to engine heat and road debris makes the plastic plugs brittle, leading to frustration with broken plugs. ECS Tuning's billet aluminum alternative puts an end to these problems.

  • Durable Replacement: Say goodbye to weak plastic drain plugs.
  • Enhanced Material: Billet aluminum provides superior strength and longevity.
  • Deeper Screw Head: Accommodates Phillips head or flat head screwdrivers for better engagement.
  • Reduced Stripping Risk: Minimize the chance of stripping out the screw head.

Don't let cooling system maintenance be a hassle. Order ECS Tuning's Billet Aluminum Radiator Drain Plug now and experience worry-free service.

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ECS Silicone Radiator Hoses - N52
For Vehicles With Engine Code N52B30 (Non-SULEV w/o Auxiliary Heating)
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T#:37723492
Part#: 008641LA03
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Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, this ECS Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, ECS hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Key Benefits:

Direct OE Fitment – Perfectly molded to factory specifications for seamless installation. Enhanced Durability – Heat-resistant silicone prevents cracking, swelling, and deterioration over time. Superior Cooling Performance – Smoother internal passageways improve coolant flow and system efficiency. Pre-Installed Quick-Connect Fittings – Hassle-free installation with OEM-style connectors. Premium Hardware Included – Comes with German-style stainless steel worm-drive hose clamps for a secure fit. Kit Includes:

Upper Radiator Hose Lower Radiator Hose Pre-Installed Factory "Quick-Connect" Flanges (4) Stainless Steel Worm-Drive Hose Clamps (4) Replaces OEM Part Numbers: 17127531579 & 17127564478

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ECS - Corporate Logo
T#:19825274
Part#: 008640LA02
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Upper and lower radiator silicone coolant hose kit to upgrade from your stock rubber hoses. Includes stainless steel hose clamps.

Upgrade all of those common, aging, dry-rotted rubber hoses under the hood of your vehicle with ECS durable, Silicone Radiator Coolant Hose Set. These perform and look great within any engine bay, they are made to last longer than standard rubber hoses and are perfectly molded to the OE hose specifications for a simple installation on most vehicles.

Made from heavy duty, reinforced silicone, this silicone coolant hose set can handle higher temperatures and greater pressure than the stock, squishy rubber hoses. Designed to resist oil, fuel and electrochemical degradation and tested up to continuous 250° Fahrenheit operating temperature and over 45psi, you can expect to achieve greater reliability, less turbulence and improved flow with our smooth silicone hoses.

Kit contents:

Upper Radiator hose
Lower Radiator hose
4 factory flange connections
German-style stainless steel hose clamps
With the smoother internal passageways, consistent hose internal diameters, and smoother bends will result in improved flow for greater cooling system performance with added durability.

The perfect way to take the worry out of your coolant hoses and keep your engine from potentially overheating.

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T#:377877
Part#: 003402ECS07A-05
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Upgrade your BMW's hose clamps with the 77-85mm - 3/4" Band Hose Clamp from Turner Motorsport. These full 304 stainless steel clamps offer convenience and quality without the dealership price tag. German-style T-bolts allow for easy adjustment to your required diameter, ensuring a secure fit every time.

  • Made of durable 304 stainless steel for long-lasting performance
  • German-style T-bolt design for easy size adjustment
  • Convenient band widths for versatile applications
  • Quality alternative to dealership pricing
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ECS - Corporate Logo
T#:45005574
Part#: 018739LA02
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Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, this ECS Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, ECS hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Key Benefits:

Direct OE Fitment – Perfectly molded to factory specifications for seamless installation.
Enhanced Durability – Heat-resistant silicone prevents cracking, swelling, and deterioration over time.
Superior Cooling Performance – Smoother internal passageways improve coolant flow and system efficiency.
Pre-Installed Quick-Connect Fittings – Hassle-free installation with OEM-style connectors.
Premium Hardware Included – Comes with German-style stainless steel worm-drive hose clamps for a secure fit.
Kit Includes:

Upper Radiator Hose
Lower Radiator Hose
Pre-Installed Factory "Quick-Connect" Flanges (4)
Stainless Steel Worm-Drive Hose Clamps (4)
Replaces OEM Part Numbers: 17127599450 & 17127540127

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ECS - Corporate Logo
T#:341684
Part#: 003402ECS06A-12
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Elevate your BMW maintenance with ECS Tuning's 304 stainless steel hose clamps, offering convenience and top-quality performance at an affordable price. Designed with various band widths and German-style T-bolts for adjustable sizing, these hose clamps ensure a secure fit for your specific diameter needs. Skip the dealership wait and excessive pricing; ECS Tuning provides reliable, dealership-quality hose clamps without the premium cost, ensuring your car receives the care it deserves.
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T#:341280
Part#: 003402ECS06A-08
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ECS Tuning 304 Stainless Steel Hose Clamps

Revolutionize your car maintenance with ECS Tuning's premium 304 stainless steel hose clamps. Eliminate dealership delays and inflated prices! These German-style clamps utilize T-bolts for hassle-free diameter adjustment. With various band widths available, these durable clamps ensure reliability without the hefty cost. Experience dealership-quality products at affordable rates, exclusively at ECS Tuning.

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ECS - Corporate Logo
T#:304266
Part#: 003402ECS06A-03
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Secure hoses in your BMW effortlessly with the ECS 3/8" / 9mm Band Hose Clamp (12-20mm). Specifically designed for BMW models, this clamp ensures a snug fit and reliable hold for hoses measuring between 12mm to 20mm. Crafted with durable materials, these clamps provide exceptional resistance against leaks and are ideal for various automotive applications. Upgrade your BMW's hose security with these reliable ECS hose clamps.
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T#:363017
Part#: 003402ECS06A-11
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Upgrade your BMW with ECS Tuning's Stainless Steel Hose Clamps, designed for convenience and durability. With various band widths and German-style T-bolts, these clamps offer easy adjustment to your required diameter. Say goodbye to dealer pricing and enjoy the quality you love at ECS Tuning.

  • Full stainless steel construction
  • Various band widths available
  • German-style T-bolts for easy adjustment
  • Convenient solution for hose clamp replacement
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Bavarian Autosport - Corporate Logo
T#:637476
Part#: 11517632426
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Water pumps are a critical component of your cooling system. A failed water pump will stop the flow of coolant in your vehicle, leading to overheating and eventual engine damage. Replace your faulty or aging water pump with a high-quality Bav Auto unit. Replacement for BMW part # 11517632426 and 11517563659. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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T#:341281
Part#: 003402ECS06A-13
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ECS Tuning 304 Stainless Steel Hose Clamps

Once again, ECS Tuning has found a way to make life easier for working on your car. Need new hose clamps but don't want to wait to order it from the dealership or pay more than you should for a hose clamp? That's where we come in! These are full 304 stainless steel hose clamps with various band widths for your convenience. They are German style using T-bolts to adjust in size to your required diameter. Never pay dealer pricing again, but still get the quality you love here at ECS Tuning.

  • Made from high-quality 304 stainless steel for durability
  • German-style design with T-bolts allows for easy size adjustment
  • Various band widths for versatile use
  • Avoid dealership pricing without compromising on quality
  • Perfect for BMW enthusiasts seeking affordable yet reliable hose clamps
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Bavarian Autosport - Corporate Logo
T#:599823
Part#: 11517586925
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Don't take your car's cooling system for granted. A waterpump failure can cost you an engine, which is why preventatively replacing your BMWs waterpump and refreshing the cooling system every 60,000 miles. The water pump is a weak point is the cooling system. Replacing your waterpump will go a long way for keeping your car on the road and operating properly. This water pump fits many 2006 and newer BMW 6 cylinder engines, specifically all the BMWs with the N51, N52, N53 engines. You will also need to purchase replacement aluminum screws Part #11510392553 From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty. This water pump fits the following BMWs: 2008-20xx E82 128i 2006-2006 E90 325i sedan, 330i sedan, 325xi sedan, 330xi sedan 2007-2012 E90 328i sedan, 328xi sedan, 328i xDrive sedan 2007-2012 E92 328i coupe, 328xi coupe, 328i xDrive coupe 2007-2012 E93 328i Convertible 2006-2006 E60 525i, 525xi, 530i, 530xi 2007-2010 E60 528i, 528xi, 528i xDrive 2007-2010 E83 X3 3.0i X3 3.0si 2007-20xx E70 X5 3.0si X5 xDrive30i 2006-2008 E85 Z4 3.0si 2009-20xx E89 Z4 sDrive30i
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T#:385425
Part#: 003402ECS05A-06
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Upgrade Your BMW Maintenance with Stainless Steel Hose Clamps from ECS Tuning

ECS Tuning introduces premium full stainless steel hose clamps, offering superior quality and convenience for your BMW maintenance. Avoid dealership delays and overpricing by choosing from a selection of band widths, ensuring you receive top-quality hose clamps without overpaying.

Key Benefits:

  • Premium full stainless steel hose clamps
  • Various band widths for enhanced convenience
  • High-quality alternative to dealership pricing
  • Readily available stock eliminates waiting time
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T#:377836
Part#: 003402ECS05A-10
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ECS Tuning Stainless Steel Hose Clamps for BMW

Upgrade your BMW's hose clamps with ECS Tuning Stainless Steel Hose Clamps, designed for convenience and durability. Say goodbye to long waits and overpriced dealership clamps. With various band widths available, these stainless steel clamps ensure a secure fit for your vehicle's hoses.

Benefits:

  • Convenient replacement for worn-out hose clamps
  • Made of durable stainless steel for long-lasting performance
  • Available in various band widths for versatile use
  • Affordable alternative to dealership pricing
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T#:380416
Part#: 003402ECS07A-03
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Ensure a tight and leak-free seal in your BMW's cooling, vacuum, or intake systems by installing a new adjustable hose clamp. Over time, clamps can deform or lose their tightness due to aging or frequent removal, potentially causing leaks in your coolant or vacuum hoses. Avoid the risk of leaks by replacing old clamps with new hardware, offering peace of mind against coolant and vacuum system issues.

Key benefits of the adjustable hose clamp include:

  • Maintaining a secure and leak-free seal in your BMW's systems.
  • Preventing coolant or vacuum leaks that can affect performance.
  • Adjustable size from 70mm to 78mm for versatile applications.

Upgrade your hose clamps to ensure optimal performance and reliability in your BMW's systems.

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Bremmen Parts - Corporate Logo
T#:15511826
Part#: 11537549476
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Overheating your N52 or N54 engine can be detrimental to the longevity of your engine. We also recommend replacing your hardware 07119903851 x2
Bremmen Parts - Corporate Logo
T#:30729012
Part#: 17127618510
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T#:36032339
Part#: 17117639020
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T#:30729018
Part#: 17127564480
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Bremmen Parts - Corporate Logo
T#:27572099
Part#: 17127548230
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Bremmen Parts - Corporate Logo
T#:30729023
Part#: 17127540020
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Bremmen Parts O-Ring
Found at the flange end of the upper thermostat hose
Bremmen Parts - Corporate Logo
T#:399143
Part#: 11537545278
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Seals your cooling system
Bremmen Parts - Corporate Logo
T#:30729019
Part#: 17127548229
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Bremmen Parts - Corporate Logo
T#:26538316
Part#: 11537601158
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Bremmen Parts - Corporate Logo
T#:38621422
Part#: 17127531579
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Coolant Hose Assembly
For manual transmission models only
Bremmen Parts - Corporate Logo
T#:30729020
Part#: 17127548223
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Bremmen Parts - Corporate Logo
T#:30729025
Part#: 17127531581
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T#:36032354
Part#: 11537516414
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Lower Cooling Hose - 17117524710
For vehicles with automatic transmission only
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T#:36913374
Part#: 17117524710
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This hose connects to the lower coolant pipe on the passenger side of vehicles equipped with automatic transmissions.


Bremmen Parts - Corporate Logo
T#:30729015
Part#: 17127599450
Ships on Dec 2, 2026
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T#:33612901
Part#: 11537601158-97C
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T#:36981059
Part#: 11537541992
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This coolant outlet hose connects the cylinder head to the thermostat housing and is a critical component of the cooling system. For many N54 owners, the "Mickey Mouse" flange is a common failure point. This plastic connector is vulnerable to degradation from heat, exposure to chemicals, and wear over time.

If your outlet hose has failed or the cylinder head flange is leaking, it’s best to replace the entire assembly for a reliable and long-lasting repair.

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Packaged by Turner - Corporate Logo
T#:17073598
Part#: 11537549476KT
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Includes everything you may need to replace your water pump and thermostat.

Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
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Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
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Packaged by Turner - Corporate Logo
T#:5376274
Part#: 11517586925TKT
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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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Packaged by Turner - Corporate Logo
T#:5376299
Part#: 11517632426TMSKT
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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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ECS - Corporate Logo
T#:568837
Part#: 020414ECS01KT
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$ 85.49 USD
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ECS - Corporate Logo
T#:599848
Part#: 004481LA01
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$ 96.89 USD
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The perfect upgrade for your connection between your thermostat and cylinder head. Designed using durable silicone and billet aluminum to greatly outlast the OE rubber and plastic combination. Some of the weakest points of the cooling systems in BMW's can come down to the OE plastic fittings breaking down from the constant changes in temperature, softening these plastic components. When this happens, even simply moving the hose slightly could cause the fitting to crack, causing the coolant to leak all over. The ECS design silicone hose with billet aluminum adapter retains OE fitment with superior strength to not only handle the performance, but also stand up to the wear and tear of a daily driver. Features: Manufactured from billet 6061-T6 and type III anodized for exceptional durability and corrosion resistance. Much stronger part than OEM plastic Will not become brittle and fatigue over time due to thermal cycling. This will prevent the part from breaking during removal and re-installation. Constructed of 4-Ply reinforced silicone for improved durability over the failure-prone OE rubber hose. Flourosilicone lined internal layer for exceptional chemical resistance. Silicone offers reduced thermal conductivity as well as improved resistance to ozone and UV degradation for improved performance and durability. Follows OEM form for perfect fitment. Utilizes OEM O-ring 11537545278 to ensure a proper seal. Replaces Genuine BMW Part Number: 11537545890
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Packaged by Turner - Corporate Logo
T#:554075
Part#: 11537601158KT2
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$ 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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Packaged by Turner - Corporate Logo
T#:15710799
Part#: 11517632426-KT
Ships in 1-3 days
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05-03-2026

$ 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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Genuine BMW - Corporate Logo
T#:36009
Part#: 11537545302
In Stock
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 14.90 USD
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05-02-2026

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Genuine BMW Gasket
This item fits the following BMW Chassis:
E82 1M Coupe,E71 X6,E82,E89 Z4,E90,E92,E93,F01,F02

Fits BMW Engines including:
N51,N54,N54T

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ECS - Corporate Logo
T#:556254
Part#: 024797ECS03
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$ 99.44 USD
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The perfect upgrade for your connection between your thermostat and cylinder head. Designed using durable silicone and billet aluminum to greatly outlast the OE rubber and plastic combination.

Some of the weakest point of the cooling systems in BMW's can come down to the OE plastic fittings breaking down from the constant changes in temperature softening these plastic components. When this happens even simply moving the hose slightly could cause the fitting to crack causing the coolant to leak all over. The ECS design silicone hose with billet aluminum adapter retains OE fitment with superior strength to not only handle the performance, but stand up to the wear and tear of a daily driver.

Features: 

  • Manufactured from billet 6061-T6 with type III anodize for exceptional durability and corrosion resistance.

    • Much stronger part than OEM plastic

    • Will not become brittle and fatigue over time due thermal cycling.  This will prevent the part from breaking during removal and re-installation.

  • Constructed of 4-Ply reinforced silicone for improved durability over the failure prone OE rubber hose.
  • Flourosilicone lined internal layer for exceptional chemical resistance.
  • Silicone offers reduced thermal conductivity as well as improved resistance to ozone and UV degradation for improved performance and durability.
  • Follows OEM form for perfect fitment.
  • Utilizes OEM O-ring 11537545278 to ensure a proper seal.
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Packaged by Turner - Corporate Logo
T#:340252
Part#: TMS214377
In Stock at Vendor
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Starting at $ 639.11 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, 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


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