Description
Fitment: 2011-2017 for BMW X3, 2015-2018 for BMW X4.OE Partment Number: 17138616418,17137639464,17137823544,603-765.Function: Turn the cooling system into a permanent closed system to reduce the loss of coolant and Avoid continuous air ingress and avoid damage of the parts..Feature: Our radiator overflow bottle not only have the resistance to heat and vibration, but also prevent cracks or leaks..Important Notes: Please match the OEM part number if you know your original one, or check if your car included in the compatibility list before placing order.