Description:

Compatible: Radiator Expansion Tank Cap Replace 17117639020 17117521071, (1.4bar) for BMW X4 2015-2017. Replacement Part Numbers: 17117639020, 17-11-7-639-020, 17117521071, 17-11-7-521-071. Easy Installation: Remove the old washer reservoir cap, then install the new cap on the washer reservoir. Make sure that it will be fitted and sealed on the washer reservoir to avoid any leaks. Package Included: 1x Coolant Reservoir Cap.