The Dorman 902-816 Engine Coolant Thermostat Housing Assembly is a high-quality replacement part designed for car and truck engines. Manufactured by Dorman, a trusted brand in automotive parts, this thermostat housing assembly ensures proper engine cooling by regulating the temperature of the coolant. Made to fit specific vehicle models, this product is a reliable component for maintaining the engine\'s performance and preventing overheating. Ideal for DIY car enthusiasts or professional mechanics, this thermostat housing assembly is a crucial component for ensuring the smooth operation of your vehicle\'s engine.fits on specific BMW models, including the 1 Series, 3 Series, 5 Series, X1, X3, and Z4.