Genuine OEM Volkswagen Thermostat Cover, part number 076121121B. This small, round cover is designed to seal and protect the thermostat or a specific coolant passage within the cylinder head assembly. It plays a role in maintaining the integrity of the engine's cooling system. Weighing 0.0245 kg and measuring 0.068m in length, this component is typically made from durable plastic or rubber. Using a genuine OEM thermostat cover ensures a precise seal and resistance to engine temperatures and coolant, preventing leaks and ensuring proper thermal regulation.