BMW Thermostats for BMW 5 Series E34 (1987-1995)

Clear BMW chassis

BMW thermostats are known to fail, but luckily they typically fail wide open - meaning that your car can still cool. We offer thermostats from various OE suppliers we trust along with upgraded motorsport specific thermostats where applicable to make sure your BMW stays cool on track.

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Mahle-Behr Thermostat - 79Âº C - E34, E39, E52

T#:341209

Part#: 11537835558

Ships in 1 Business Day

$ 74.00

This product was last offered at the strikethrough price on
06-05-2026

$ 61.49 USD

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$ 61.49 USD

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Includes sealing o-ring

Mahle-Behr Thermostat - 92C - E34, E36, E39

T#:12476

Part#: 11537511083

Ships in 8 Business Days

$ 29.99

This product was last offered at the strikethrough price on
05-22-2026

$ 27.65 USD

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$ 27.65 USD

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OEM BMW THERMOSTAT:115040

Thermostat - 80°C

T#:594727

Part#: 11531713040

Ships on Sep 16, 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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