Wahler BMW Thermostats for BMW E46 M3 S54 (1999-2005)

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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OEM Wahler 80 Degree Thermostat - E46 M3, MZ3 S54, Z4 M

T#:360524

Part#: 11531318274

In Stock

$ 105.99

This product was last offered at the strikethrough price on
06-25-2026

$ 68.99 USD

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$ 68.99 USD

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Replacement 80* Celcius thermostat for E46 M3, Z3M w S54 engine, Z4M. The thermostat can be replaced on the E46 M3 without removing the water pump. This can save you money if the pump still has life left on it but the thermostat needs to be done now. Symptoms of a bad thermostat include an erratic temp gauge and a fault code. When replacing the thermostat, there are three o-rings that will likely need to be replaced between the thermostat and the water pump housing, and two on the coolant tube going to the head. We also recommend new hoses, clamps, and BMW coolant. Replacement should take about one hour.

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