Material: The thermostat shell is made of aluminum, which is lightweight, not easy to deform, and is durable。 Installation steps: Directly replace the damaged car thermostat housing assembly to improve driving safety performance。 A2742003400 A2742000715 For M274 For E20 Car Engine Coolant Thermostat Features: The engine coolant thermostat controls coolant flow ensuring the engine operates at the proper temperature effectively extending engine and providing you with an driving experience. Function: This thermostat and housing system is designed to effectively manage engine temperature enhance engine performance and prevent overheating.