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Rein BMW Cooling System Parts & Accessories

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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Rein - Corporate Logo
T#:34080754
Part#: 17127578405
Ships in 4 Business Days
$ 47.99 USD
Free Shipping on orders $49 and up

Water Hose - Expansion Tank to Radiator (Vent Hose) is an essential component for maintaining the proper function of your BMW’s cooling system. This high-quality hose ensures efficient coolant flow between the expansion tank and radiator, preventing overheating and reducing the risk of coolant leaks. Designed to meet or exceed OEM specifications, the Water Hose - Expansion Tank to Radiator (Vent Hose) provides a perfect fit for reliable, long-lasting performance. Available through Turner Motorsport, this hose is a direct-fit replacement that ensures seamless installation and superior engine cooling.

  • Specifically engineered for BMW models to guarantee a perfect fit
  • Ensures proper coolant flow between the expansion tank and radiator
  • Prevents overheating and reduces the risk of coolant leaks
  • Made from durable, heat-resistant materials for long-lasting performance
  • Direct-fit replacement for easy installation without modifications
  • Meets or exceeds OEM specifications for reliable performance

Upgrade your BMW’s cooling system with the Water Hose - Expansion Tank to Radiator (Vent Hose), ensuring optimal engine performance and protection against overheating.

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Rein - Corporate Logo
T#:53750119
Part#: 11537598237
Ships in 4 Business Days
New Item
$ 26.99 USD
Free Shipping on orders $49 and up
$ 26.99 USD
Free Shipping on orders $49 and up
Rein's Rubber Elbow Problem Solver Kit for the Coolant Feed Hose Replaces the Rubber End of the Hard Feed Line Without Having to Move the Exhaust or Replace the Entire Hard Line
Rein - Corporate Logo
T#:46478582
Part#: CHT0690
Back Ordered
$ 56.00

This product was last offered at the strikethrough price on
04-28-2026

$ 55.99 USD
Free Shipping on orders $49 and up
$ 55.99 USD
Free Shipping on orders $49 and up
Your turbo is constantly working under extreme heat and pressure, generating serious boost every time you get on the gas. The turbo cooling lines are responsible for circulating coolant through the turbocharger, keeping temperatures in check and safeguarding internal components from excessive heat. With time, these lines can corrode, crack, or clog—compromising coolant flow and system efficiency. If left unchecked, a failing line can lead to overheating, loss of performance, or even costly turbo damage. Why replacing them matters: Protect your turbo – Ensures proper cooling to prevent heat soak and extend turbo life. Stop leaks early – Prevent small coolant drips from turning into bigger, more expensive problems. Keep performance consistent – Reliable cooling means steady boost and dependable operation. Don’t let a tired cooling line put your turbo at risk—replace it and keep your forced-induction system performing at its best.
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Rein - Corporate Logo
T#:594317
Part#: 17127560974
Ships in 4 Business Days
$ 37.99 USD
Free Shipping on orders $49 and up
Radiator to Auto Trans Oil Cooler

Rein - Corporate Logo
T#:52516266
Part#: ELC0090
Ships in 4 Business Days
New Item
$ 69.99 USD
Free Shipping on orders $49 and up
The Rein ELC0090 is a critical component for BMW N52-series engines, replacing the often-ignored "angle connector" located beneath the intake manifold.
Rein - Corporate Logo
T#:375746
Part#: 17127508011
In Stock at Vendor
$ 75.99 USD
Free Shipping
$ 75.99 USD
Free Shipping
This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.
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Rein - Corporate Logo
T#:46616010
Part#: EPK0128
Ships in 4 Business Days
$ 86.99

This product was last offered at the strikethrough price on
04-28-2026

$ 74.99 USD
Free Shipping on orders $49 and up
$ 74.99 USD
Free Shipping on orders $49 and up
The coolant expansion tank acts as a reservoir for excess coolant as it expands and contracts with temperature changes. Over time, the constant exposure to extreme heat cycles can cause the tank to crack, break, or suffer damage to its nipples or mounting points. To keep coolant properly contained within the system, a damaged tank should be replaced promptly.
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Rein - Corporate Logo
T#:34181294
Part#: 11538854737
Ships in 4 Business Days
$ 46.99 USD
Free Shipping on orders $49 and up

The Rein Water Feed Tube with O-ring CHT0924 is a premium replacement part designed for BMW vehicles, ensuring optimal engine cooling performance. Manufactured with high-quality materials, this water feed tube guarantees durability and a precise fit, making it an ideal solution for restoring or upgrading your BMW’s cooling system. Available through Turner Motorsport, this part ensures the prevention of coolant leaks and maintains the efficiency of your vehicle’s cooling system.

This water feed tube is engineered to withstand the intense heat and pressure found in high-performance engines, delivering long-lasting reliability. It’s compatible with a variety of BMW models, making it a versatile choice for both professional mechanics and DIY enthusiasts.

Benefits:

  • Precise fitment: Specifically designed for BMW applications to ensure seamless replacement.
  • High-quality materials: Built to endure high-temperature and high-pressure environments.
  • O-ring seal: Ensures a leak-proof connection, preventing coolant loss and engine overheating.
  • Optimized engine performance: Helps maintain consistent engine temperatures for improved vehicle performance.
  • Available at Turner Motorsport: Trusted source for BMW parts and accessories.

Keep your BMW running smoothly with the Rein Water Feed Tube with O-ring CHT0924, designed to restore your cooling system’s functionality and keep your engine in peak condition.

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Rein - Corporate Logo
T#:639804
Part#: 17117575247
Ships in 4 Business Days
$ 20.99 USD
Free Shipping on orders $49 and up
This is the left side radiator bracket.

Rein - Corporate Logo
T#:46719185
Part#: CHK0583
Ships in 4 Business Days
New Item
$ 69.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Water Hose With O-Ring - Cylinder Head To Thermostat Housing ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594303
Part#: 11537585023
Ships in 4 Business Days
$ 30.11 USD
Free Shipping on orders $49 and up
Replacement Water Hose from Rein
Rein - Corporate Logo
T#:53750144
Part#: CHU0629
In Stock at Vendor
New Item
$ 56.99 USD
Free Shipping on orders $49 and up
Upgraded Coolant Hose from Rein Featuring Metal Flanges to Reduce Leaks


Rein - Corporate Logo
T#:45997535
Part#: WPS0502
In Stock at Vendor
$ 811.99 USD
Free Shipping on orders $49 and up
Rein Electric Water Pump Replacement Kits offer a valuable solution to failure-prone cooling-related components on the N52 BMW engine platforms. At the heart of these kits are OEM electric water pumps, which are complemented by Rein's problem solver hoses.
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Rein - Corporate Logo
T#:46719168
Part#: CHK0401R
Ships in 4 Business Days
New Item
$ 52.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. **Why choose this Rein radiator hose kit:** * **Factory-level precision** – Direct-fit replacements that deliver OEM-quality reliability. * **Built to last** – Resists cracking, swelling, and chemical damage from daily heat cycling. * **Confidence restored** – Prevents coolant loss, overheating, and on-road breakdowns. * **All-in-one upgrade** – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:594372
Part#: 17127612444
Ships in 4 Business Days
$ 57.99 USD
Free Shipping on orders $49 and up
Replacement Radiator Hose - Engine To Radiator from Rein

Rein - Corporate Logo
T#:52516262
Part#: CHE0993
Back Ordered
New Item
$ 64.99 USD
Free Shipping on orders $49 and up
Restore your cooling system’s integrity with the Rein CHE0993 Engine Coolant Hose.

Rein - Corporate Logo
T#:52516268
Part#: EPT0274
Back Ordered
New Item
$ 114.99 USD
Free Shipping on orders $49 and up
Protect your BMW investment with the Rein EPT0274 Engine Coolant Reservoir, the professional’s choice for cooling system restoration.
Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
Upgrade your cooling system with the Rein Automotive replacement coolant hose, engineered to meet or exceed the rigorous standards of your BMW.

Rein - Corporate Logo
T#:46478542
Part#: WPR0046
Ships in 4 Business Days
$ 795.99 USD
Free Shipping on orders $49 and up
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
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Rein - Corporate Logo
T#:53750147
Part#: CHU0632
In Stock
New Item
$ 52.99 USD
Free Shipping on orders $49 and up
Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges

Rein - Corporate Logo
T#:52903280
Part#: 17128616914
In Stock
New Item
$ 45.99

This product was last offered at the strikethrough price on
08-03-2026

$ 42.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 45.99

This product was last offered at the strikethrough price on
08-03-2026

$ 42.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
This Rein Automotive coolant hose is an exact-fit aftermarket solution for the BMW "By-Pass Hose".

Rein - Corporate Logo
T#:45791754
Part#: 17127508011R
Ships in 4 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.
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Rein - Corporate Logo
T#:49404665
Part#: 11428583901
In Stock
New Item
$ 434.99 USD
Free Shipping on orders $49 and up
For those who push their engines to the limit, "good enough" is a liability. Upgrade to the Rein HEU0116 Aluminum Oil Filter Housing—the professional’s choice for durability and peace of mind.
Rein - Corporate Logo
T#:594319
Part#: 17127555290
Ships in 4 Business Days
$ 27.99 USD
Free Shipping on orders $49 and up
Prevents over-pressurization


Rein - Corporate Logo
T#:594371
Part#: 17127582894
Ships in 4 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
Replacement cooling hose from Rein
Rein - Corporate Logo
T#:46616026
Part#: EPK0025
Back Ordered
$ 74.99 USD
Free Shipping on orders $49 and up
The coolant expansion tank provides a place for excess coolant to flow as temperatures rise and fall. Because it’s exposed to constant heat cycles and pressure changes, it can eventually crack, split, or suffer damage to its nipples or mounting points. Keeping coolant properly contained within the system is essential, so if your tank shows signs of wear or damage, replacement is necessary. This direct-fit replacement installs easily and delivers the same heating and cooling performance as the factory unit. When replacing the tank, be sure to have additional coolant on hand. ECS Tuning carries a full range of vehicle-specific coolants designed to meet OEM specifications. Most German vehicles require specialized formulas—using the correct coolant will help prevent corrosion and ensure long-term reliability.
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Rein - Corporate Logo
T#:46616001
Part#: WPS0505
Ships in 4 Business Days
$ 944.99 USD
Free Shipping on orders $49 and up
Late-model external water pumps are typically more dependable and easier to service, with no gasket or O-ring to worry about. Replacing higher-mileage units during routine cooling system maintenance is a smart way to add extra peace of mind. Includes: Water pump Thermostat assembly Water pump elbow Coolant hoses Necessary hardware
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Rein - Corporate Logo
T#:46719171
Part#: CHK0198
Ships in 4 Business Days
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:46719193
Part#: CHK0032P
Ships in 4 Business Days
New Item
$ 76.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:17704768
Part#: 11537519710
Ships in 4 Business Days
$ 46.99 USD
Free Shipping on orders $49 and up
Water pipes are essential for proper cooling. If they are cracked, they are going to need to be replaced as soon as possible to avoid overheating your engine.

Rein - Corporate Logo
T#:33946933
Part#: 17129894739
Ships in 4 Business Days
$ 54.99 USD
$ 54.99 USD

Rein Radiator Hose

The Rein - Radiator Hose is a premium solution for maintaining your vehicle's cooling system. Manufactured with high-quality materials, it offers superior resistance to heat, pressure, and wear, ensuring optimal performance for an extended period. Designed specifically for European vehicles, this radiator hose guarantees a perfect fit and seamless installation, making it ideal for both professional mechanics and DIY enthusiasts. Rein's durable and flexible construction helps prevent leaks, keeps engine temperatures stable, and extends engine life.

  • Superior Heat and Pressure Resistance: Built to endure extreme engine conditions, minimizing the risk of overheating.
  • OEM Fitment: Designed to meet or exceed the original specifications for European vehicles, ensuring a precise fit.
  • Long-lasting Durability: Made from premium rubber, reinforced for longevity and optimal performance.
  • Leak Prevention: Provides a tight, leak-proof connection, ensuring no coolant loss.
  • Easy Installation: Perfect for quick replacement, compatible with a variety of makes and models.

Get the Rein Radiator Hose from Turner Motorsport, where quality parts meet precision engineering.

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Rein - Corporate Logo
T#:45791753
Part#: 17139485733
Ships in 4 Business Days
$ 64.99

This product was last offered at the strikethrough price on
04-28-2026

$ 52.99 USD
Free Shipping on orders $49 and up
$ 52.99 USD
Free Shipping on orders $49 and up
Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance
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Rein - Corporate Logo
T#:46719179
Part#: CHK0009P
Ships in 4 Business Days
New Item
$ 67.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:46719187
Part#: CHK0373R
Ships in 4 Business Days
New Item
$ 66.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:14023861
Part#: 11518635089-4
Ships in 4 Business Days
$ 898.99 USD
Free Shipping on orders $49 and up
$ 898.99 USD
Free Shipping on orders $49 and up
Kits include: water pump thermostat assembly head to thermostat hose w/ aluminum flange WP to engine hose WP to thermostat hose all necessary clamps and hardware This Rein water pump service kit addresses common coolant hose plastic flange failure and ensures that the water pump replacement repair is done right the first time. The water pump and thermostat are OEM Use of OE or Pentosin NF-G11 coolant is recommended
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Rein - Corporate Logo
T#:46719188
Part#: CHK0462
Ships in 4 Business Days
New Item
$ 43.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:14023856
Part#: 11518635089-3
Ships in 4 Business Days
$ 898.99 USD
Free Shipping on orders $49 and up
$ 898.99 USD
Free Shipping on orders $49 and up
Kits include: water pump thermostat assembly head to thermostat hose w/ aluminum flange WP to engine hose WP to thermostat hose all necessary clamps and hardware This Rein water pump service kit addresses common coolant hose plastic flange failure and ensures that the water pump replacement repair is done right the first time. The water pump and thermostat are OEM Use of OE or Pentosin NF-G11 coolant is recommended
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Rein - Corporate Logo
T#:45757471
Part#: 17125A02485
Ships in 4 Business Days
$ 41.99 USD
Free Shipping on orders $49 and up
$ 41.99 USD
Free Shipping on orders $49 and up
This hose connects the expansion tank to the radiator. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Rein - Corporate Logo
T#:38161716
Part#: 92810625703
In Stock at Vendor
$ 11.99 USD
Free Shipping on orders $49 and up
Rein Automotive OE Quality caps are designed to be direct replacements for OE caps. Rein caps are designed to match or exceed the OE materials used and are produced to the highest standards to ensure long service life. Rein Automotive OE quality caps keep the coolant system at the proper pressure, just like the OE cap.
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Rein - Corporate Logo
T#:46719182
Part#: CHK0033
Ships in 4 Business Days
New Item
$ 66.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:46616025
Part#: EPK0138
Ships in 4 Business Days
$ 71.99 USD
Free Shipping on orders $49 and up
The coolant expansion tank allows excess coolant to flow in and out as temperatures rise and fall. Over time, repeated exposure to extreme temperature changes can cause the tank to crack, split, or break. To keep your cooling system sealed and functioning properly, any tank showing signs of damage—such as cracks, broken nipples, or compromised mounting points—should be replaced.
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Rein - Corporate Logo
T#:46753499
Part#: CHK0030R
Ships in 4 Business Days
New Item
$ 50.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:46719192
Part#: CHK0005
In Stock at Vendor
New Item
$ 43.99 USD
Free Shipping on orders $49 and up
Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Rein - Corporate Logo
T#:594374
Part#: 17127639213
Ships in 4 Business Days
$ 51.99

This product was last offered at the strikethrough price on
08-12-2026

$ 37.99 USD
Free Shipping on orders $49 and up
$ 37.99 USD
Free Shipping on orders $49 and up
Replacement Lower Radiator Coolant Hose from Rein

Rein - Corporate Logo
T#:46616019
Part#: EPK0146
Ships in 4 Business Days
$ 93.99 USD
Free Shipping on orders $49 and up
The coolant expansion tank serves as a reservoir for excess coolant as it expands and contracts with changing temperatures. Since it’s constantly exposed to extreme heat cycles, it can eventually crack, split, or suffer broken nipples or mounting points. To keep your cooling system sealed and operating properly, any damaged tank should be replaced.
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Rein - Corporate Logo
T#:53750149
Part#: CHU0633
Ships in 4 Business Days
New Item
$ 56.99 USD
Free Shipping on orders $49 and up
Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges
Rein - Corporate Logo
T#:46615999
Part#: WPS0507
Ships in 4 Business Days
$ 961.99 USD
Free Shipping on orders $49 and up

Late-model external water pumps are typically more dependable and easier to service, with no gasket or O-ring to worry about. Replacing higher-mileage units during routine cooling system maintenance is a smart way to add extra peace of mind.

Late-model external water pumps have the advantage of being generally more reliable, while also being easier to service, not requiring a gasket or o-ring. Replacing high mileage units during cooling system services provides peace of mind.

Includes:

Water pump
Thermostat assembly
Water pump elbow
Coolant hoses
Necessary hardware

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Rein - Corporate Logo
T#:53750141
Part#: CHU0460
Ships in 4 Business Days
New Item
$ 52.99 USD
Free Shipping on orders $49 and up
Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges


Rein - Corporate Logo
T#:38161726
Part#: RSW0021
Ships in 4 Business Days
$ 711.23 USD
Free Shipping on orders $49 and up
Includes a new electric water pump, serpentine belt, belt tensioners, and idler pulleys
Rein - Corporate Logo
T#:45791749
Part#: 17137642160
In Stock
$ 85.00

This product was last offered at the strikethrough price on
04-28-2026

$ 79.99 USD
Free Shipping on orders $49 and up
$ 79.99 USD
Free Shipping on orders $49 and up
Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance
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