This original BMW expansion tank holds engine coolant for the low-temperature radiator loop on U11 X1 M35i (2023+) and U10 X2 M35i (2024+).
This part is listed by BMW as BMW part number 17135A14989 (17-13-5-A14-989) and is described as Genuine BMW Reservoir for Engine Coolant, B48R.
Threaded cap sold separately. Please see below for BimmerWorld recommended related items.
BMW Fitments:
X1 Series
U11 X1 (2023+) > X1 xDriveM35i B48R (2023+)
X2 Series
U10 X2 (2024+) > X2 xDriveM35i B48R (2024+)
