Jetta. Engine Coolant Thermostat Gasket. Engine Coolant Thermostat Housing O-Ring. Engine Coolant Thermostat Housing Seal. Part inclued with water pump assembly. Vendor:INZI. Engine Coolant Thermostat Gasket. Engine Coolant Thermostat Housing O - Ring. Engine Coolant Thermostat Housing Seal. Seal ring. Thermostat cover o - ring. Thermostat cover seal. Thermostat hsng gasket. Thermostat hsng o - ring. Thermostat hsng seal. Thermostat outlt o - ring. Thermostat outlt seal. Included with: Thermostat housing, Thermostat unit, Water pump, Water pump assembly.