BMW Cooling System Parts & Accessories for BMW E90 M3 S65 4.0L

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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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Radiator Adjustment Screw / Drain Plug
Radiator Adjustment Screw / Drain Plug
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T#:37959694
Part#: 17107523260
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$ 56.99 USD
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Constructed from high-strength, heat-resistant plastic, this component is designed to endure extreme temperatures and fluctuating pressure levels, ensuring the cooling system functions optimally and maintains peak efficiency.
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Rogue Engineering Silicone Radiator Hose Kit - E9X M3
Rogue Engineering Silicone Radiator Hose Kit - E9X M3
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T#:13694122
Part#: RADE9X-M3-ONLY
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$ 79.00 USD
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Benefits of Rogue Engineering Silicone Radiator Hoses More resistant to high temperatures, solvents and oil, when compared to OEM rubber hoses. Temperature ranges from -149° F to 500° F, much larger range than OEM (typical range for OEM is -40o F to +275o F) Our hoses can handle more pressure, with a maximum pressure of 350psi. Our silicone hoses stay flexible, whereas rubber can harden and crack over time. Available only in BLACK color, with discrete RE logo. All Rogue Engineering Silicone Radiator Hose kits come complete with new, replacement hose clamps as the factory ones are not suitable for reuse after long years of service. Application Notes The E9X M3 kit replaces 11537838214 and 11537840661 and fits the following: 2008-2013 E9X M3 (US and Euro) Notes: The E9X M3 hose kit requires the use of OEM connectors from the original hoses.
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Temperature Sensor
Temperature Sensor
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T#:37892090
Part#: 13621433076
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$ 10.34 USD
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$ 10.34 USD
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Temperature sensor for monitoring coolant and oil
URO Coolant Bleeder Screw - Priced Each - BMW E9X F10
URO Coolant Bleeder Screw - Priced Each - BMW E9X F10
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T#:5416748
Part#: 11537793373
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$ 1.99 USD
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$ 1.99 USD
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URO Coolant Bleeder Screw - Priced Each - BMW E9X F10

The URO Coolant Bleeder Screw - Priced Each - BMW E9X F10 is a crucial component for maintaining optimal performance in your BMW's cooling system. When performing routine service, ensuring that all air pockets are removed from the coolant system is vital for proper function. Air pockets in the cooling system can prevent heat from circulating properly, potentially causing issues such as reduced heating efficiency or even engine overheating if trapped behind the thermostat.

  • Ensures proper air removal from the cooling system for improved engine performance
  • Prevents air pockets from interfering with heat circulation and engine cooling
  • Easy installation for an efficient and secure fit
  • Durable construction designed to withstand high pressure and temperature conditions
  • Helps maintain a fully functional cooling system, avoiding overheating and damage
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Radiator Carrier - Right
Radiator Carrier - Right
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T#:593028
Part#: 17107524914
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$ 49.99 USD
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$ 49.99 USD
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Plastic side frame for radiator
Expansion Tank Cap
Expansion Tank Cap
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T#:373099
Part#: 17137516004
Ships in 1 Business Day
$ 15.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD
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$ 10.99 USD
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The coolant expansion 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.
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Rubber Lower Radiator Mount Insert - Priced Each
Rubber Lower Radiator Mount Insert - Priced Each
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T#:593045
Part#: 17117805310
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$ 18.99 USD
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$ 18.99 USD
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Found at the bottom of the radiator

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