Original BMW Radiator to Expansion Tank Coolant Pipe for BMW X1, X2, and Mini Cooper (2014–2019)

Part number 17-12-7-617-366 is an Original BMW coolant pipe that links the radiator to the expansion tank on the 2016–2019 BMW X1, 2018–2019 X2, and 2014–2019 Mini Cooper family. BMW names it the pipe for the radiator and expansion tank. At 27 g (0.95 oz) it is a small, light hose section, made in Germany and sold individually. BMW shows production starting in December 2013.

Original BMW Parts like this pipe carry a 24-month parts warranty.

The hose between the radiator and the reservoir carries coolant into the tank as it expands with engine heat. As the engine cools, the same hose lets coolant draw back toward the radiator, keeping the system at the correct level. In BMW's data this one number spans the F48 X1, the F39 X2, and the F45 and F46 2 Series. Those cars run the B38, B48, and B46 gasoline engines as well as diesel variants. The same pipe covers both the BMW and Mini models in our fitment. Hoses showing deformation should be replaced right away.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 17-12-7-617-366
• BMW name: pipe, radiator to expansion tank
• Weight: 27 g (0.95 oz)
• Production start: December 2013
• Country of manufacture: Germany
• Sold as: one piece
• Warranty: 24-month parts warranty

Common Questions

What symptoms point to this hose?
A leak at the hose or reservoir can cause overheating. A faulty coolant hose can also set the check engine light through a fault in the coolant temperature or level readings.

Is this the same pipe on the X1 and X2?
Yes. BMW applies this one number to the F48 X1 and the F39 X2 across their engine range.

PMB Performance supplies Original BMW cooling parts for the X1, X2, and Mini models.

Fitment & Compatibility

Use the fitment table below to confirm year, make, model, submodel, and any notes tied to your exact vehicle. Pay close attention to engine, chassis, position, and option-specific details before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.