Description:

Fits: For 2002 for A4. Strong Point: Controls the flow of coolant through the radiator regulating heat dissipation and allows engine to reach operating temperature as quickly as possible. Features: The coolant remaining in the radiator of the tank will flow back to the expansion tank to prevent over pressure in the tank. Conversely, when the water level in the tank is too low, the tank can also replenish the water level.. Advantage: Our radiator cooling expansion tank is easy to install, no need additional hardware.Toolant thermostat control the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature.