Thermostat, OEM - E46 M3, MZ3 S54, E85 Z4M

OEM 80-degree Celsius thermostat for your cooling system

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Price:
$66.99

This part is listed by BMW as BMW part number 11531318274 (11 53 1 318 274) and is described as OEM engine coolant thermostat for the S54 engine in the E46 M3, MZ3, and E85/E86 Z4M. It also fits with the Euro S50 engine in E36 M3. A new o-ring is included.

Your engine's thermostat regulates coolant flow and temperature in the cooling system. When open it allows hot coolant to flow into the radiator to be cooled. When closed the coolant circulates through the engine, where it stays warm. A failed thermostat will either be open or closed with the engine running too cold (poor fuel economy and performance) or too hot (overheating). It can also impact your cabin heating/cooling since that system is drawn from your heater core.

This is an OEM thermostat manufactured by Wahler - the original supplier to BMW for this part, as well as many other cooling components. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

BMW Fitments:
3 Series
E46 (99-05) > M3
Z Series
E36/7 / E36/8 Z3 (96-02) > Z3 M - S54
Z Series
E85 / E86 Z4 (03-08) > Z4 M
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