Rein BMW Cooling System Parts & Accessories for BMW 4 Series F32 (2014+)

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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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OEM Rein Aluminum Coolant Flange Connector - BMW & MINI B36 B46/B...
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T#:33679696
Part#: 11118511205
In Stock
$ 50.99 USD
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$ 50.99 USD
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Plastic coolant flanges become brittle over time, which can cause them to crack and fail. Prevent overheating and coolant loss with this OEM Rein upgraded aluminum coolant flange.
Rein Coolant Hose - Upper - F22, F23, F30, F32, F33, F34, F36, F87 ...
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T#:568810
Part#: 17127604542
In Stock
$ 45.99 USD
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This hose goes from the radiator to the oil cooler. After years of use and exposure to heat, the hoses in your car can dry up and crack, resulting in nasty leaks - or worse. Replace your rotted, leaking hoses before they lead to larger problems.
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Rein Coolant Hose Metal Connector With Sensor - BMW F22/23 F3X B58 Ge...
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T#:38789910
Part#: CHK0940
In Stock
$ 73.99 USD
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$ 73.99 USD
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The OE plastic connector is a frequent failure point due to brittleness and cracking caused by repeated thermal cycling and hydrolysis. Hydrolysis, the breakdown of plastic or rubber by water exposure, weakens the structure over time, leading to failure. To combat these issues, Rein’s upgraded connectors are constructed from high-strength aluminum, eliminating the vulnerabilities of plastic connectors and ensuring long-term durability.
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Rein Coolant Hose Aluminum Connector - BMW F22/23 F3X B58 Gen1 ...
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T#:39059272
Part#: 11118619408
Back Ordered
$ 47.99 USD
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$ 47.99 USD
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The OE plastic connector is a frequent failure point due to brittleness and cracking caused by repeated thermal cycling and hydrolysis. Hydrolysis, the breakdown of plastic or rubber by water exposure, weakens the structure over time, leading to failure. To combat these issues, Rein’s upgraded connectors are constructed from high-strength aluminum, eliminating the vulnerabilities of plastic connectors and ensuring long-term durability.
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Rein- Radiator Hose - F36 430i,F31 330i, F22 230i
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T#:33946936
Part#: 17128616528
Ships in 1 Business Day
$ 76.99 USD
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Rein's durable and flexible construction of their radiator hoses 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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Coolant Return Hose - N55
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T#:4826895
Part#: 17128570061
In Stock
$ 38.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure. This item fits the following BMW Chassis: F22,F30,F31,F32,F33,F34,F36 Fits BMW Engines including: N55
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OEM Rein Coolant Hose - F07/10 F22/3 F3X N20
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T#:402116
Part#: 11538645481
In Stock
$ 23.99 USD
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Years of use and heat exposure can wear out the hoses on your car. To prevent leaks, you should periodically replace hoses as part of your regular maintenance routine.
Rein Water Hose With Gasket - Water Pump To Engine Inlet
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T#:17804808
Part#: 11537584630R
Ships in 1 Business Day
$ 40.99 USD
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Rein OE quality water hoses are designed to be direct replacements for OE hoses and assemblies. This includes the hose and clamps.

Rein Cylinder Head Expansion Tank Hose CHE0925- Priced Each - F22 230...
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T#:34181285
Part#: 17129845173
Ships in 2 Business Days
$ 29.99 USD
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Rein Cylinder Head Expansion Tank Hose CHE0925 is a top-quality component designed specifically for BMW vehicles, ensuring optimal coolant flow between the cylinder head and expansion tank. This hose is engineered to withstand high engine temperatures and pressures, preventing coolant leaks and safeguarding the engine from overheating. The Rein Cylinder Head Expansion Tank Hose CHE0925 is perfect for BMW enthusiasts who prioritize vehicle reliability and performance.

Manufactured from premium materials, this hose guarantees durability and longevity under demanding conditions. Its precise design ensures a perfect fit, making installation easy for both professional mechanics and DIY car enthusiasts. Available from Turner Motorsport, this product is an excellent choice for anyone looking to maintain peak engine performance.

Key Benefits:

  • Designed specifically for BMW vehicles to ensure a perfect fit and compatibility
  • Regulates coolant flow, preventing engine overheating and damage
  • Made from high-quality, durable materials that withstand extreme engine conditions
  • Easy installation for quick maintenance and hassle-free replacement
  • Ideal for both professional mechanics and DIY car enthusiasts
  • Available from Turner Motorsport, a trusted supplier of BMW parts

The Rein Cylinder Head Expansion Tank Hose CHE0925 is a must-have part for maintaining the cooling efficiency and overall health of your BMW engine.

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Coolant Hose - Upper
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T#:585137
Part#: 17127596837
In Stock
$ 76.71

This product was last offered at the strikethrough price on
05-22-2026

$ 70.99 USD
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$ 70.99 USD
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Coolant supply all around your engine is very important and if this is ever compromised by a leak or other complication, it can put your engines health in serious danger.
Coolant Hose
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T#:593072
Part#: 17127596841
In Stock
$ 29.88

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

$ 26.99 USD
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$ 29.88

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

$ 26.99 USD
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Rein Coolant Hose - BMW F22/23 F3X
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T#:594310
Part#: 11537639997
In Stock
$ 57.99 USD
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Water pipes and coolant hoses 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 Coolant Hose - BMW F22/23 F3X
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T#:591823
Part#: 11537639998
In Stock
$ 42.99 USD
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Connects from water pump to block
Charge Air Cooler Expansion Tank - Rein | BMW F22/23, F3X B48/B46 B58...
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T#:38229110
Part#: 17138617045
Ships in 3 Business Days
$ 73.99 USD
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Charge Air Cooler Expansion Tank - Rein | BMW F22/23, F3X B48/B46 B58 is an essential component that ensures proper coolant circulation in the charge air cooling system. Acting as a reservoir, this expansion tank allows coolant to expand and contract with temperature fluctuations, preventing excessive pressure buildup. Over time, plastic tanks can become brittle due to constant exposure to heat cycles, leading to cracks and leaks. A failing tank can cause coolant loss, reducing the efficiency of the charge air cooler and leading to increased intake temperatures, which negatively impact horsepower and engine performance. Rein offers a high-quality direct replacement designed for durability and a perfect fit on BMW F22, F23, and F3X models with B48, B46, and B58 engines.

  • Maintains proper coolant circulation within the charge air cooling system
  • Prevents excessive pressure buildup caused by temperature fluctuations
  • Durable construction resists cracking and leaks for long-lasting performance
  • Direct replacement for BMW F22, F23, and F3X models with B48, B46, and B58 engines
  • Helps maintain optimal intake air temperatures, preserving horsepower and efficiency
  • OE-quality fitment ensures hassle-free installation and reliable function
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Rein Coolant Hose - F22, F23, F30, F31, F32, F33, F34, F36
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T#:592012
Part#: 17127596838
Ships in 3 Business Days
$ 50.99 USD
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Connects the thermostat to the radiator

Rein Water Pump Service Kit - N20
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T#:14023850
Part#: 11518635089-1
Ships in 3 Business Days
$ 777.99 USD
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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 Transmission Oil Heat Exchanger Hose F33 430i, F23 230iX, F31 33...
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T#:33913483
Part#: 17127640287
Ships in 3 Business Days
$ 38.99 USD
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The Hose Transmission Oil Heat Exchanger is a crucial component in maintaining the longevity and performance of your vehicle's transmission system. This part is designed to efficiently cool down the transmission oil, ensuring that your transmission operates at optimal temperatures, reducing wear and tear. Available at Turner Motorsport, this high-quality heat exchanger is engineered to meet the demands of high-performance vehicles, making it an excellent choice for both daily drivers and track enthusiasts.

  • Optimizes transmission oil temperature to prevent overheating
  • Enhances the lifespan of your transmission system
  • Durable construction for long-lasting performance
  • Ideal for performance and high-demand driving conditions
  • Compatible with a wide range of vehicle makes and models

    Upgrade your vehicle’s transmission cooling system with the Hose Transmission Oil Heat Exchanger and drive with confidence knowing your transmission is protected.

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Radiator Hose - Radiator To Thermostat Housing
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T#:594316
Part#: 17127604546
Ships in 3 Business Days
$ 29.99 USD
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Replacement radiator hose from Rein

Coolant Hose
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T#:554682
Part#: 17127596831
In Stock at Vendor
$ 21.99 USD
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Keep your engine running at operating temperature with this coolant hose
Radiator Hose
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T#:594373
Part#: 17127619255
Ships in 3 Business Days
$ 132.99 USD
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$ 132.99 USD
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Replacement Radiator Hose from Rein

Radiator Hose - Radiator To Thermostat Housing
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T#:594377
Part#: 17127619256
Ships in 1 day
$ 97.12

This product was last offered at the strikethrough price on
02-25-2026

$ 88.99 USD
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$ 88.99 USD
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Replacement Radiator Hose - Radiator To Thermostat Housing from Rein

Coolant Expansion Tank
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T#:17704748
Part#: 17138677649
In Stock
$ 148.99

This product was last offered at the strikethrough price on
03-16-2026

$ 118.99 USD
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$ 118.99 USD
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Rein Engine Inlet To Changeover Valve Hose
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T#:52903280
Part#: 17128616914
In Stock
New Item
$ 45.99 USD
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This Rein Automotive coolant hose is an exact-fit aftermarket solution for the BMW "By-Pass Hose".
BMW Turbo Cooling Line
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T#:46478582
Part#: CHT0690
In Stock at Vendor
$ 56.00

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

$ 55.99 USD
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$ 55.99 USD
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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 Water Hose Problem Solver Kit - F chassis N55
For Manual Transmission Only
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T#:53750119
Part#: 11537598237
Ships in 3 Business Days
New Item
$ 26.99 USD
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$ 26.99 USD
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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 Thermostat Assembly - F Chassis, G-Chassis - B48
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T#:53891628
Part#: 11537644811
Ships in 3 Business Days
New Item
$ 322.99 USD
$ 322.99 USD
Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.
Rein Water Pump Service Kit - N20
For production years 2014-2016
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T#:14023854
Part#: 11518635089-2
In Stock at Vendor
$ 1,309.99

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

$ 1,272.99 USD
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$ 1,272.99 USD
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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 Aluminum Oil Filter Housing - BMW B58
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T#:49404665
Part#: 11428583901
In Stock at Vendor
New Item
$ 408.99 USD
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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 Water Hose With Metal Flange - F-Chassis - N55
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T#:53750147
Part#: CHU0632
Ships in 3 Business Days
New Item
$ 52.99 USD
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Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges
Rein Turbo Cooling Line - Return
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T#:17771598
Part#: 11538663517
In Stock at Vendor
$ 86.99

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

$ 84.99 USD
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$ 84.99 USD
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Rein turbo hoses are manufactured with premium OE quality material to offer maximum protection from premature failures.

BMW Coolant Expansion Tank - 17137642160
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T#:45791749
Part#: 17137642160
In Stock
$ 85.00

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

$ 79.99 USD
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$ 79.99 USD
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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 Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11,...
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T#:53856297
Part#: 11538611277
Back Ordered
New Item
$ 44.99 USD
$ 44.99 USD
Rein Automotive Turbo Hoses are engineered to meet these rigorous standards, utilizing premium, OE-quality materials specifically formulated to withstand the extreme duty cycles of modern forced-induction systems.
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