Coolant thermostat / housing Thermostat housing with thermostat regulating coolant flow as the engine warms up NAPA "NTH1035" - Not availableBMW - 3 (E46, WB), 5 (E39, WB), Z3, Z4, X3, 7 (E38, E65, E66), X5; WIESMANN - MF3