Rein BMW Cooling System Parts & Accessories for BMW G32 640i xDrive B58 3.0L

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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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Rein Coolant Hose Metal Connector With Sensor - BMW F22/23 F3X B58 Gen1
Rein Coolant Hose Metal Connector With Sensor - BMW F22/23 F3X B58 Ge...
For models with the earlier B58 Gen1 engine only - Not compatible with the later TU eng...
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T#:38789910
Part#: CHK0940
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$ 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
Rein Coolant Hose Aluminum Connector - BMW F22/23 F3X B58 Gen1 ...
For models with the earlier B58 Gen1 engine only - Not compatible with the later TU eng...
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
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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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OEM Rein Expansion Tank w/ Cap - G30 540iX, G32 640iX, G11 740i
OEM Rein Expansion Tank w/ Cap - G30 540iX, G32 640iX, G11 740i ...
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
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T#:33946948
Part#: 17139846642
In Stock
$ 99.65 USD
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$ 99.65 USD
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The Expansion Tank is an essential part of your vehicle’s cooling system, designed to accommodate the expansion of coolant as it heats up during engine operation. This high-quality tank helps regulate coolant pressure, preventing overheating and ensuring optimal engine performance. Built to meet or exceed OEM standards, this expansion tank is crafted from durable, heat-resistant materials to provide long-lasting reliability. It offers a direct fit for a wide range of European vehicles, ensuring easy installation.

  • Prevents Overheating: Manages coolant expansion to maintain consistent engine temperature.
  • Durable Construction: Made from premium, heat-resistant materials to ensure long-term durability.
  • OEM Quality Fit: Designed for a precise fit, meeting or exceeding original equipment specifications.
  • Leak-Proof Design: Provides a secure seal to prevent coolant loss and maintain system efficiency.
  • Easy Installation: Direct replacement part, compatible with a variety of European vehicle models.

Find the Rein Expansion Tank at Turner Motorsport for top-quality replacement parts and reliable performance.

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Coolant Return Line
Coolant Return Line
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T#:53856300
Part#: 11538650087
Ships in 3 Business Days
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$ 60.99 USD
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$ 60.99 USD
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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.
BMW Coolant Expansion Tank - 17139485733
BMW Coolant Expansion Tank - 17139485733
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T#:45791753
Part#: 17139485733
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$ 64.99

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

$ 52.99 USD
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$ 52.99 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 Aluminum Oil Filter Housing - BMW B58
Rein Aluminum Oil Filter Housing - BMW B58
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T#:49404665
Part#: 11428583901
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$ 408.99 USD
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$ 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 Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11, G30, G32 - B58
Rein Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11,...
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T#:53856297
Part#: 11538611277
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$ 44.99 USD
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$ 44.99 USD
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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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