Buy 2003 Volkswagen Jetta GLI Engine Coolant Thermostat Housing. 2.8 LITER. Golf, GTI, R32; 2.8L. Golf Cooling, Water, Wagon - OEM Volkswagen Part # 021121121C (021-121-121-C)

Adapter. Engine Coolant Thermostat Housing. Thermostat cover. Water Neck.
4.0L Engine Includes Housing. Engine Coolant Housing where a Thermostat is used but not included.

Engine Coolant Thermostat Housing

Fits Golf, GTI, Jetta, Jetta GLI, Jetta Wagon, Passat, Passat Wagon

2.8 LITER. Golf, GTI, R32; 2.8L. Golf, GTI; 2.8L. Jetta; 2.8L. Jetta; 2.8L; Sedan. Jetta; 2.8L; Wagon. Passat; 2.8L. Passat; 2.8L; Old Style.
Engine Coolant Thermostat Housing - Repair or Replace
A failed thermostat housing will likely result in a cooling system leak, or will cause the engine in your 2003 Volkswagen Jetta GLI to overheat. Consider replacing your engine coolant thermostat or having our staff of expert techs handle it for you.