BMW Cooling System Parts & Accessories for BMW F90 M5 S63 4.4L

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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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Bav Auto Spill-Proof Coolant / Antifreeze Funnel
Bav Auto Spill-Proof Coolant / Antifreeze Funnel
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Bav Auto Tools - Corporate Logo
T#:580395
Part#: B8800082
In Stock
Sale - Save 15% $ 32.99

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

$ 28.04 USD
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$ 32.99

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

$ 28.04 USD
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Multiple adapters include to fit a variety of vehicles.
Bav Auto Fan Clutch Wrench - 32mm
Bav Auto Fan Clutch Wrench - 32mm
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Bav Auto Tools - Corporate Logo
T#:580348
Part#: B8800019
In Stock
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This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD
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$ 29.99

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

$ 23.99 USD
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Used to remove your fan clutch
Radiator / Cooling System Pressure Tester- Bavarian Autosport
Radiator / Cooling System Pressure Tester- Bavarian Autosport ...
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Bav Auto Tools - Corporate Logo
T#:580397
Part#: B8800084
In Stock
Sale - Save 15% $ 146.99

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

$ 124.94 USD
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$ 146.99

This product was last offered at the strikethrough price on
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$ 124.94 USD
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BMW F90 M5 / F9X M8 Level Performance Coolant Expansion Tank Shield
BMW F90 M5 / F9X M8 Level Performance Coolant Expansion Tank Shield ...
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IND - Corporate Logo
T#:27572122
Part#: LVL.EN.22.326
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$ 618.99 USD
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$ 618.99 USD
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The coolant trap shield serves to stop antifreeze from the expansion tank from reaching the engine compartment and potentially causing damage to costly electrical parts, especially during periods of high fluid expansion. In the event of fluid splashing from the expansion tank, this shield intercepts it, guiding it through a designated outlet at the base of the trap for proper drainage. **Please note that this component is compatible with all North American models and European vehicles adhering to EU6c Emissions Standards (up to January 2021), but it is not suitable for Euro models meeting EU6d with RDE Level 2 standards.**
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Bav Auto Angled Hose Pinch Plier Set - 2pc
Bav Auto Angled Hose Pinch Plier Set - 2pc
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Bav Auto Tools - Corporate Logo
T#:580379
Part#: B8800058
In Stock
Sale - Save 25% $ 32.99

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

$ 24.74 USD
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Sale - Save 25%
$ 32.99

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

$ 24.74 USD
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Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.
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