Genuine OEM Audi Thermostat Housing, part number 03L121111AL. This component is responsible for enclosing the engine's thermostat and directing the flow of coolant through the engine cooling system. It ensures that coolant is routed efficiently to maintain optimal engine operating temperature. Made from durable black plastic, this housing weighs 0.301 kg. Genuine OEM thermostat housings provide precise fitment and material integrity, preventing leaks and ensuring the proper function of the engine's critical cooling system.