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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Packaged by Turner - Corporate Logo
T#:39093005
Part#: 11518635090KT6
In Stock
$ 470.99

This product was last offered at the strikethrough price on
06-03-2026

$ 446.99 USD
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$ 446.99 USD
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Water Pump And Thermostat Kit - BMW N55 F Chassis

Ensure optimal engine cooling and performance with this high-quality Water Pump And Thermostat Kit - BMW N55 F Chassis. In the mid-2000s, BMW introduced electronically controlled water pumps and thermostats for better temperature regulation and efficiency. However, these components tend to have a shorter lifespan compared to traditional mechanical designs, often failing before BMW’s recommended 80,000-mile service interval.

This complete kit from Turner Motorsport includes premium-quality components that match OEM specifications, providing reliable and efficient cooling system performance. Maintaining a properly functioning cooling system helps prevent overheating, enhances efficiency, and extends engine life.

Signs Your Water Pump and Thermostat May Need Replacement:

  • Engine overheating or failing to reach operating temperature
  • Water pump running intermittently or erratically
  • Cooling fans operating at maximum output
  • Engine fault codes, including 20A804

Upgrade your BMW N55 F Chassis cooling system with this all-in-one kit for worry-free performance and longevity.

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Packaged by Turner - Corporate Logo
T#:4799665
Part#: THERMINSTALLKT
In Stock
Sale - Save 6% $ 22.99

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

$ 21.64 USD
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Sale - Save 6%
$ 22.99

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

$ 21.64 USD
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BMW N54 N55 S55 Mosselman Thermostat Installation Kit is designed to ensure a seamless installation of the Mosselman thermostat on BMW engines. This comprehensive kit from Turner Motorsport includes all necessary gaskets and components, guaranteeing a reliable and precise installation for optimal engine performance.

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

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

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Packaged by Turner - Corporate Logo
T#:35863149
Part#: 11518638026TKT
In Stock
Sale - Save 5% $ 731.99

This product was last offered at the strikethrough price on
06-30-2026

$ 696.75 USD
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Sale - Save 5%
$ 731.99

This product was last offered at the strikethrough price on
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$ 696.75 USD
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BMW's cooling system has long been a known weak spot, with the water pump and thermostat being two of the most common trouble areas. This remains true even in the latest B-Series engines found in 2016 and newer BMW models. This kit includes a brand-new OEM Pierburg water pump, a Bremmen thermostat (now referred to as a Heat Management Module), and one gallon of BMW's G48 coolant concentrate (enough to make two gallons of 50/50 coolant). Avoid spending thousands at the dealership or over $600 on Genuine BMW parts! These components can be replaced with high-quality OEM parts in just an afternoon using basic hand tools.
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Packaged by Turner - Corporate Logo
T#:27871814
Part#: 11518632585TKT
Ships on Aug 31, 2026
Sale - Save 5% $ 156.99

This product was last offered at the strikethrough price on
01-31-2026

$ 149.40 USD
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Sale - Save 5%
$ 156.99

This product was last offered at the strikethrough price on
01-31-2026

$ 149.40 USD
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If your water pump is leaking coolant, there is a good chance one of the seals has failed. This is especially common when your coolant level gets too low and your BMW's water pump runs without coolant. The water pump shaft seal can fail as it gets too hot and you will begin to notice coolant dripping from the weep hole found at the bottom of your pump. We recommend replacing the whole pump to ensure your BMW stays cool for many more years! This kit includes the basic parts necessary to replace your water pump: GEBA Mechanical Pump with an upgraded metal impeller Elring Water Pump Gasket Genuine BMW Water Pump Bolts (x6) Don't forget to pick up a gallon of BMW coolant as well to top your system back off once you have completed your pump installation! Servicing your accessory belt and tensioner is also great to do at this time as the belt must be removed before replacing your pump.
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Packaged by Turner - Corporate Logo
T#:27605427
Part#: 17138677649TKT
In Stock at Vendor
Sale - Save 5% $ 208.99

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

$ 198.66 USD
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Sale - Save 5%
$ 208.99

This product was last offered at the strikethrough price on
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$ 198.66 USD
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Genuine BMW expansion tanks have a bad habit of failing after a few years. This has primarily been caused by the plastic construction of the expansion tanks. After enough heat cycles, the plastic becomes brittle and can crack, causing coolant to leak out and air to enter the coolant system. If a failing expansion tank is not addressed soon enough, the coolant loss can lead to an overheating engine. This kit includes two brand new high quality expansion tanks and caps
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Packaged by Turner - Corporate Logo
T#:55353595
Part#: OTN54.T85KT3
Ships in 1-3 days
New Item
$ 390.23 USD
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High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.

OEM Rein Aluminum Coolant Flange Connector - BMW & MINI B36 B46/B48 G...
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Rein - Corporate Logo
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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Rein - Corporate Logo
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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Rein - Corporate Logo
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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Rein - Corporate Logo
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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Coolant Return Hose - N55
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Rein - Corporate Logo
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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Rein- Radiator Hose - F36 430i,F31 330i, F22 230i
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Rein - Corporate Logo
T#:33946936
Part#: 17128616528
In Stock
$ 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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OEM Rein Coolant Hose - F07/10 F22/3 F3X N20
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Rein - Corporate Logo
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 Coolant Hose - BMW F22/23 F3X
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat! For vehicles with automatic transmissions only.
Rein - Corporate Logo
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 - Corporate Logo
T#:53750147
Part#: CHU0632
In Stock at Vendor
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 Water Hose With Gasket - Water Pump To Engine Inlet
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Rein - Corporate Logo
T#:17804808
Part#: 11537584630R
Back Ordered
$ 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 - Corporate Logo
T#:49404665
Part#: 11428583901
In Stock
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 Cylinder Head Expansion Tank Hose CHE0925- Priced Each - F22 230...
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Rein - Corporate Logo
T#:34181285
Part#: 17129845173
Ships in 3 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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Genuine MINI - Corporate Logo
T#:28337931
Part#: 17135A1BD89
Ships in 3 Business Days
9% off MSRP $ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 31.99 USD
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9% off MSRP
$ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 31.99 USD
Free Shipping on orders $49 and up
Coolant Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:593072
Part#: 17127596841
In Stock
$ 29.88

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

$ 26.99 USD
Limited Qty Sale
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$ 29.88

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

$ 26.99 USD
Limited Qty Sale
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Rein Coolant Hose - BMW F22/23 F3X
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat! For vehicles with manual transmissions only.
Rein - Corporate Logo
T#:591823
Part#: 11537639998
In Stock
$ 42.99 USD
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Connects from water pump to block

Coolant Hose
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Rein - Corporate Logo
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
Rein Coolant Hose - F22, F23, F30, F31, F32, F33, F34, F36
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Rein - Corporate Logo
T#:592012
Part#: 17127596838
Ships in 4 Business Days
$ 50.99 USD
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Connects the thermostat to the radiator
Radiator Hose - Radiator To Thermostat Housing
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Rein - Corporate Logo
T#:594316
Part#: 17127604546
Ships in 4 Business Days
$ 29.99 USD
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Replacement radiator hose from Rein


Coolant Hose - Upper
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Rein - Corporate Logo
T#:585137
Part#: 17127596837
In Stock at Vendor
$ 79.58 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.
Rein Transmission Oil Heat Exchanger Hose F33 430i, F23 230iX, F31 33...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:33913483
Part#: 17127640287
Ships in 4 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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Rein Automotive Turbocharger Coolant Pipes CHT0903
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Rein - Corporate Logo
T#:34147743
Part#: 11537643094
Ships in 2 Business Days
$ 61.99 USD
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Turbocharger Coolant Pipes CHT0903 are high-performance components designed to efficiently manage coolant flow in turbocharged engines. Available from Turner Motorsport, these coolant pipes are specifically engineered for BMW vehicles, ensuring optimal cooling of the turbocharger system. By maintaining the right temperature, these pipes help extend the lifespan of your turbocharger while improving engine performance and efficiency.

These Turbocharger Coolant Pipes offer a perfect OEM fit for easy installation, making them ideal for both professionals and BMW enthusiasts. Crafted from durable, heat-resistant materials, they ensure long-lasting reliability and resistance to wear and tear, providing a robust solution for maintaining the performance of your vehicle’s turbocharged engine.

Key Features:

  • Specifically designed for turbocharged BMW engines
  • Perfect OEM fit for seamless installation
  • Efficiently manages coolant flow to the turbocharger
  • Enhances turbocharger performance and engine efficiency
  • Made from durable, heat-resistant materials
  • Available from Turner Motorsport, a trusted provider of high-quality BMW parts

For anyone looking to maintain or upgrade their BMW’s turbocharged engine, these Turbocharger Coolant Pipes are a crucial component that ensures optimal cooling and long-term reliability.

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Rein Water Pump Service Kit - N20
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Rein - Corporate Logo
T#:14023850
Part#: 11518635089-1
Ships in 4 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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Charge Air Cooler Expansion Tank - Rein | BMW F22/23, F3X B48/B46 B58...
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Rein - Corporate Logo
T#:38229110
Part#: 17138617045
Ships in 4 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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Coolant Expansion Tank
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Rein - Corporate Logo
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 - Corporate Logo
T#:45791749
Part#: 17137642160
Back Ordered
$ 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 - Corporate Logo
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".

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
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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 Turbo Cooling Line - Return
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Rein - Corporate Logo
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.
Rein Water Pump Service Kit - N20
For production years 2014-2016
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Rein - Corporate Logo
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 - Corporate Logo
T#:53750119
Part#: 11537598237
Ships in 4 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