Description:

Fits: 2011-2017 for BMW X3,2015-2018 for BMW X4. 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 overpressure in the tank. Conversely, when the water level in the tank is too low, the tank can also replenish the water level.. Eazy Installation: Our radiator cooling expension tank is easy to install, no need additional hardware..