BMW Motorsport Thermostat - E46 M3, MZ3 S54, Z4M, E36 Euro M3

Our Motorsport Thermostat is a must for any E46 M3 or Euro E36 M3 that sees time on track where temperatures are above normal. We've found that the cooler you can make these engines run, the more power you'll have, so this 55 °C Motorsport Thermostat is ideal. Longer warm-up time should be expected in cooler areas of the country.

Fits all years of E46 M3, 2001-2002 MZ3 S54, and Z4M. Also Fits Euro-spec S50B30 and S50B32 E36 M3 engines - will NOT work in US-spec E36 engines.

An o-ring is NOT included. Please see our o-ring options under Related Items below.

For track/racing use only. Not designed or intended for street/road use.

This is a part that we buy directly from BMW Motorsport. It was originally designed by Motorsport engineers for competition use in a factory BMW racing program. As a part designed for competition use, it does not have a warranty. BMW Motorsport parts may sometimes be in short supply and orders are released at the discretion of BMW Motorsport. If a part is not in stock, contact us for the latest estimate on delivery time.