Description
The official factory description for part number 06H121119D is Engine Water Pump Housing Gasket, though it is often referred to in dealership networks as a thermostat housing seal or coolant pump washer. This component is a specialized, molded rubber profile seal designed to create a pressurized, liquid-tight junction between the water pump assembly, the thermostat housing, and the engine block on Volkswagen and Audi 1.8L and 2.0L TSI/TFSI engines. It functions primarily to contain high-temperature engine coolant under system pressure, preventing critical fluid leaks beneath the intake manifold








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