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BMW Cooling System Parts & Accessories for BMW 3 Series E30 (1984-1991)

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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Thermostat - 80°C

T#:594727

Part#: 11531713040

Ships on Aug 4, 2026

$ 35.99 USD

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$ 35.99 USD

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The thermostat on your vehicle controls the flow of coolant based on temperature. When you just start your engine, the thermostat remains closed to accelerate the warm up process. After a few minutes, it opens up to allow the warm fluid to flow. If your vehicle is overheating but not blowing warm air from the heater, the problem is more than likely your thermostat.

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Coolant Level Sensor

T#:30728984

Part#: 61311378320

In Stock

Sale - Save 56% $ 34.99

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

$ 15.29 USD

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Sale - Save 56%

$ 34.99

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

$ 15.29 USD

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

T#:640140

Part#: 17111712788

In Stock

Sale - Save 39% $ 3.99

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

$ 2.44 USD

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Sale - Save 39%

$ 3.99

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

$ 2.44 USD

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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Fan Shroud - 17111709312

T#:37655982

Part#: 17111709312

Special Order: No Guaranteed ETA

Sale - Save 21% $ 63.99

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

$ 50.58 USD

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Sale - Save 21%

$ 63.99

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

$ 50.58 USD

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If your fan shroud is broken or in bad condition, be sure to replace it to maintain optimum cooling efficiency. This OE replacement from Bremmen Parts is a direct fit for your E30, and offers exact fitment to ensure a lasting repair.

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BMW Cooling System Parts & Accessories for BMW 3 Series E30 (1984-1991)

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Thermostat - 80°C

Coolant Level Sensor

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

Fan Shroud - 17111709312

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