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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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Water Pump Blind Plug
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594382
Part#: 11531439134
In Stock
$ 7.76 USD
Free Shipping on orders $49 and up
Replacement Water Pump Blind Plug from Rein
Rein - Corporate Logo
T#:39059266
Part#: 17135A6A030
In Stock
$ 86.99

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

$ 75.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 86.99

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

$ 75.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Coolant expansion tanks can crack over time, especially during services where they need to be removed. Replace your tank with a brand new tank to ensure your cooling system remains leak-free.
Rein Turbocharger Coolant Line CHU0902
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34147744
Part#: 11537577012
Ships in 1 Business Day
$ 69.99 USD
Free Shipping on orders $49 and up

Rein Turbocharger Coolant Line CHU0902 is a high-quality replacement part designed to ensure optimal cooling for BMW turbocharged engines. This coolant line, available from Turner Motorsport, is engineered to efficiently regulate coolant flow to prevent overheating of the turbocharger, protecting it from damage and extending its lifespan. The Rein Turbocharger Coolant Line CHU0902 offers a perfect OEM fit for seamless installation, making it an ideal choice for both professional mechanics and BMW enthusiasts.

Constructed with durable, heat-resistant materials, this coolant line ensures long-lasting performance and reliability. It’s a vital component for maintaining engine efficiency and maximizing the performance of your BMW’s turbo system.

Key Features:

  • Designed for BMW turbocharged engines to prevent turbo overheating
  • Perfect OEM fit for easy, hassle-free installation
  • Efficient coolant regulation improves engine and turbocharger longevity
  • Made from durable, heat-resistant materials for long-term reliability
  • Available from Turner Motorsport, a trusted source for BMW parts and performance upgrades

For BMW owners looking to enhance engine performance and protect the turbo system, the Rein Turbocharger Coolant Line CHU0902 is a must-have upgrade.

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OEM Rein Coolant Hose - E60 525/530 M54
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:340689
Part#: 17127519256
In Stock
$ 47.93

This product was last offered at the strikethrough price on
05-02-2026

$ 42.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 47.93

This product was last offered at the strikethrough price on
05-02-2026

$ 42.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

Water Pump to Thermostat Cooling Hose - E30 E34 E28
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6917
Part#: 11531287651
In Stock
$ 10.99 USD
Free Shipping on orders $49 and up
Replace your cracked or leaking coolant hose with this radiator coolant hose that goes from the waterpump to the thermostat on cars with the M20 engine. We recommend inspecting cooling system hoses for dry rot / cracks yearly.

This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1982-1988 E28 BMW 528e
1989-1990 E34 BMW 525i
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Rein - Corporate Logo
T#:45757472
Part#: 17128602603
In Stock
$ 69.99

This product was last offered at the strikethrough price on
05-15-2026

$ 58.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 69.99

This product was last offered at the strikethrough price on
05-15-2026

$ 58.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
This coolant hose connects the lower radiator outlet port to the engine. Coolant hoses can become brittle and crack over time. If your coolant hose has begun to leak, replace it as soon as possible to prevent coolant loss and overheating.
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Rein Expansion Tank Hose - E39
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375748
Part#: 11531438633
Ships in 1 Business Day
$ 18.99 USD
Free Shipping on orders $49 and up
$ 18.99 USD
Free Shipping on orders $49 and up
Runs from the expansion tank to auxiliary water pump
Rein Radiator Hose - Upper - E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6973
Part#: 11531743535
In Stock
$ 16.99 USD
Free Shipping on orders $49 and up
OEM BMW ENGINE WATER HOSE 11531743535.--

This item fits the following BMWs:
BMW 3 Series - 318i, 318i Convertible, 318is, 318ti
BMW Z Series - Z3 1.9

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Intercooler Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:584477
Part#: 17137647281
In Stock at Vendor
$ 71.99 USD
Free Shipping
$ 71.99 USD
Free Shipping

OEM Rein Cooling Hose - E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362532
Part#: 13541703865
Ships in 1 day
$ 20.99

This product was last offered at the strikethrough price on
09-29-2026

$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Rein - Throttle Body Hose - E36 318i, Z3 1.9
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:33980410
Part#: 11531247398
Ships in 1 Business Day
$ 6.83 USD
Free Shipping on orders $49 and up

Throttle Body Hose by Rein is a key component designed to optimize airflow to your BMW’s engine, ensuring enhanced throttle response and overall engine performance. This hose connects the air intake system to the throttle body, delivering a precise flow of air that improves fuel efficiency and engine power. Manufactured from high-quality, heat-resistant materials, the Throttle Body Hose by Rein is built to withstand extreme temperatures and pressures, making it a durable and long-lasting solution for your BMW. Available at Turner Motorsport, this hose is a direct fit replacement, ensuring easy installation and perfect compatibility with OEM standards.

  • Optimizes airflow to the throttle body, improving engine performance and efficiency
  • Enhances throttle response, contributing to smoother acceleration
  • Constructed from durable, heat-resistant materials, ensuring long-lasting performance
  • Direct fit replacement, allowing for easy installation and OEM compatibility
  • Boosts overall engine efficiency, improving fuel economy and engine power

Turner Motorsport offers the Throttle Body Hose by Rein as a reliable solution to maintain your BMW’s air intake system, ensuring smooth and efficient engine operation.

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Cool Retrun Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379713
Part#: 17127540666
Ships in 3 Business Days
$ 80.99 USD
Free Shipping
$ 80.99 USD
Free Shipping
Connects to the radiator


OEM Rein Coolant Hose - E36 Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379763
Part#: 11531743295
In Stock at Vendor
$ 13.99 USD
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Coolant Hose from Expansion Tank - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6964
Part#: 11531730351
Ships in 1 Business Day
$ 18.79 USD
Free Shipping on orders $49 and up
This coolant hose connects the water hose part #11531738053 to the radiator coolant expansion tank.Fits E36 3 series with M50, S50 or S52 engine.

This item fits the following BMWs:
1992-1998 E36 BMW 325i 325is 325ic M3
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Rein Coolant Expansion Tank - E65, E66
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593077
Part#: 17137647713
Ships in 3 Business Days
$ 99.99 USD
Free Shipping
$ 99.99 USD
Free Shipping
Replace your cracked or faded tank

Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592158
Part#: 17122754219
Ships in 3 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up

BMW Radiator Hose Kit - 17127575427
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719185
Part#: CHK0583
Ships in 3 Business Days
$ 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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Module Bracket
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:639804
Part#: 17117575247
Ships in 3 Business Days
$ 20.99 USD
Free Shipping on orders $49 and up
This is the left side radiator bracket.

Turbocharger Coolant Return Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:4826913
Part#: 11538485578
Ships in 3 Business Days
$ 66.99 USD
Free Shipping on orders $49 and up
Cylinder 1-4 Turbo Return Line. Keep your turbos healthy and lubricated. Rein quality replacement turbo return line.
BMW Radiator Hose Kit - 17127519257
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719182
Part#: CHK0033
Ships in 3 Business Days
$ 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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BMW Water Pump Kit - E9X/E8X N54/55
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616001
Part#: WPS0505
Ships in 3 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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BMW Coolant Expansion Tank - 17139485733
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45791753
Part#: 17139485733
In Stock at Vendor
$ 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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Cooling Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594371
Part#: 17127582894
Ships in 3 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
Replacement cooling hose from Rein
Expansion Tank Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375751
Part#: 17111723521
Ships in 1 Business Day
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Connects the expansion tank to the radiator


Rein Expansion Tank Cap - E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592018
Part#: 17137639023
Ships in 3 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
1.4 Bar pressure
Rein Coolant Temperature Sensor - BMW E6X, E7X, E9X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516266
Part#: ELC0090
Ships in 3 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#:34114219
Part#: 17127537101
Ships in 3 Business Days
$ 55.99 USD
Free Shipping on orders $49 and up

Water Hose - Radiator To Auto Trans Oil Cooler is a critical component designed to maintain the optimal performance of your BMW’s cooling system. This high-quality hose ensures efficient coolant transfer from the radiator to the automatic transmission oil cooler, preventing overheating and protecting essential engine components. Available at Turner Motorsport, this durable hose is engineered to handle high temperatures and pressure, making it a perfect replacement or upgrade for your vehicle’s cooling system.

  • Designed for BMW automatic transmissions
  • Ensures proper coolant flow between the radiator and transmission oil cooler
  • Prevents overheating of vital engine and transmission components
  • Manufactured from heat-resistant, durable materials for longevity
  • Direct-fit replacement for easy installation
  • Helps maintain engine efficiency and cooling performance

The Water Hose - Radiator To Auto Trans Oil Cooler from Turner Motorsport is the ideal solution to ensure your BMW’s cooling system functions smoothly, offering long-term reliability and protection for your engine and transmission.

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Rein - Corporate Logo
T#:34181294
Part#: 11538854737
Ships in 3 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 Coolant Hose - E28, E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379671
Part#: 13541719966
Ships in 1 Business Day
$ 6.11 USD
Free Shipping on orders $49 and up
$ 6.11 USD
Free Shipping on orders $49 and up
Thermostat to throttle housing
Rein- Coolant Hose F10 535i, F13 640i, F07 535i
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34080749
Part#: 17127580963
Ships in 3 Business Days
$ 83.99 USD
Free Shipping on orders $49 and up

Rein Coolant Hose is a premium replacement part designed for BMW models, ensuring efficient and reliable coolant flow throughout the engine’s cooling system. This hose is crucial for regulating engine temperature and preventing overheating, maintaining optimal performance in a wide range of driving conditions. Manufactured to meet or exceed OEM specifications, the Rein Coolant Hose offers a direct-fit solution for easy installation and long-lasting durability. Available through Turner Motorsport, this coolant hose is the ideal upgrade for BMW owners looking to maintain or improve their vehicle’s cooling system.

  • Specifically designed for BMW models to ensure perfect fit and compatibility
  • Regulates coolant flow to prevent engine overheating
  • Constructed from high-quality, heat-resistant materials for durability
  • Reduces the risk of leaks and cooling system failures
  • Direct-fit replacement
  • Meets OEM standards for reliable cooling system performance

Enhance your BMW’s cooling efficiency and engine reliability with the Rein Coolant Hose, providing the necessary protection against overheating and coolant system failure.

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Rein Reservoir Hose R50 / R52
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34114213
Part#: 17127526414
Ships in 3 Business Days
$ 9.99 USD
Free Shipping on orders $49 and up

Reservoir Hose CHE0885 is a top-quality replacement part designed for BMW vehicles, ensuring a reliable connection between your vehicle’s reservoir and cooling system. Engineered for durability and heat resistance, this hose provides a seamless flow of coolant to maintain optimal engine temperature, preventing overheating. Reservoir Hose CHE0885 is made to meet or exceed OEM specifications, ensuring a perfect fit for your BMW. Available through Turner Motorsport, this hose is an essential component for keeping your vehicle's cooling system functioning efficiently.

  • High-quality reservoir hose for BMW vehicles
  • Ensures reliable coolant flow for optimal engine performance
  • Made from heat-resistant, durable materials
  • Prevents overheating and engine damage
  • Meets or exceeds OEM specifications
  • Perfect fit for a variety of BMW models
  • Available from trusted supplier Turner Motorsport
  • Easy to install with secure connections
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Rein Water Pump Service Kit - N20
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:14023856
Part#: 11518635089-3
Special Order: No Guaranteed ETA
$ 898.99

This product was last offered at the strikethrough price on
08-24-2026

$ 715.99 USD
Free Shipping on orders $49 and up
$ 715.99 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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Water Pump
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:38161720
Part#: 11517632426
Ships in 3 Business Days
$ 782.99 USD
Free Shipping on orders $49 and up

Rein Turbo Cooling Line - Return
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17771598
Part#: 11538663517
Ships in 1 Business Day
$ 86.99

This product was last offered at the strikethrough price on
05-07-2026

$ 76.99 USD
Free Shipping on orders $49 and up
$ 76.99 USD
Free Shipping on orders $49 and up
Rein turbo hoses are manufactured with premium OE quality material to offer maximum protection from premature failures.
BMW Turbo Cooling Line
2X Entries Into Our F80 M3 Sweepstakes
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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Coolant Hose - Short
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591825
Part#: 11517829913
Ships in 3 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up


Rein Coolant Expansion Tank - With Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891623
Part#: 17135A6A030C
Back Ordered
New Item
$ 99.99 USD
$ 99.99 USD
Replace your old brittle expansion tank
OEM Rein Radiator Cap - E21 E24 E10 E12 E23 E28
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:7395
Part#: 17111100848
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up
The radiator tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap. Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.
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OEM Rein Water Pump Coolant Hose - BMW F15 F16 N55 3.0L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757475
Part#: 11537649394
In Stock at Vendor
$ 67.99 USD
Free Shipping on orders $49 and up
This hose connects the primary water pump to the thermostat housing. Coolant hoses can become brittle over time, leading to cracks and coolant leaks. If your coolant hose is leaking, replace it early to prevent coolant loss and eventual overheating.
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Expansion Tank - 17137617362
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46478556
Part#: EPT0238
Ships in 3 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
These expansion tanks tend to leak and will need replaced

Rein - Thermostat Assembly 82C - X5 M62, X5 N62
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34080721
Part#: 17107559966
Ships in 3 Business Days
$ 51.99

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

$ 48.99 USD
Free Shipping on orders $49 and up
$ 48.99 USD
Free Shipping on orders $49 and up

Thermostat Assembly 82C is a high-quality, precision-engineered component designed to regulate the engine's cooling system effectively. Manufactured to meet or exceed OEM specifications, this thermostat helps ensure optimal engine performance by maintaining the ideal operating temperature. Available from Turner Motorsport, this part offers superior durability and reliability for a wide range of vehicle models.

  • Designed for precise temperature control
  • Maintains engine at the optimal 82°C (180°F) temperature
  • Helps prevent overheating and improves fuel efficiency
  • Direct fit replacement for hassle-free installation
  • Manufactured from high-quality materials for long-lasting performance

Upgrade your vehicle's cooling system with this essential Thermostat Assembly 82C, ensuring smooth engine operation under various driving conditions.

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Rein Water Hose (Right Outlet) - E32 E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593082
Part#: 17221728944
Ships in 3 Business Days
$ 28.99 USD
Free Shipping on orders $49 and up
$ 28.99 USD
Free Shipping on orders $49 and up
Transmission Oil Cooler to Water Manifold

Rein Radiator Hose - Lower - Z4
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:386347
Part#: 17127535591
In Stock at Vendor
$ 59.99 USD
Free Shipping on orders $49 and up
$ 59.99 USD
Free Shipping on orders $49 and up
Keep your cooling system leak free
Upper Radiator Hose - Short Section
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592156
Part#: 17122754203
Ships in 3 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up

Rein Water Pipe With O-Rings
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17704768
Part#: 11537519710
Ships in 3 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.

Lower Radiator Hose To Thermostat Housing
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592151
Part#: 17121475561
Ships in 3 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Coolant Hose - Upper
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592193
Part#: 17127535901
Ships in 3 Business Days
$ 12.99 USD
Free Shipping on orders $49 and up
Rein - Corporate Logo
T#:45757431
Part#: 11539488188
Ships in 3 Business Days
$ 55.99 USD
Free Shipping on orders $49 and up
$ 55.99 USD
Free Shipping on orders $49 and up
The coolant return hose is responsible for taking cooling from the turbocharger and returning it back to the engine coolant system, allowing a free flow of coolant to keep the turbocharger temperatures under control.
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BMW Radiator Hose Kit - 17127531581
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719188
Part#: CHK0462
Back Ordered
$ 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#:55965843
Part#: 171386106612
Ships in 3 Business Days
New Item
$ 49.99 USD
$ 49.99 USD
Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.
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