MISHIMOTO Performance Thermostat, 74C,165F N52 N54 N55 BMW

The Mishimoto BMW Racing Thermostat is designed to fit all N52, N54, and N55 engines, providing a reliable solution for improved cooling efficiency. High engine temperatures are common in modified or upgraded BMW straight‑six platforms, and a lower‑temperature thermostat helps maintain consistent performance under demanding conditions.

Once the engine reaches operating temperature, the Mishimoto Racing Thermostat opens earlier than the factory unit, allowing coolant to circulate sooner and reducing overall engine temperatures. This earlier activation helps stabilize thermal conditions, improves heat management, and supports long‑term engine reliability across both street and track use.