Original BMW Expansion Tank to Cylinder Head Coolant Pipe for BMW G20 330i (2019–2024)

Connecting the coolant expansion tank to the cylinder head, this Original BMW pipe completes that coolant path on the G20 330i and 330i xDrive from 2019 through 2024. BMW calls it the pipe, expansion tank to cylinder head. It is sold as a single piece. Production of this number began in November 2018, at the start of the G20 3 Series. It is made in Poland. Lines like this carry coolant between the reservoir and the engine, so a split or a loose fit shows up as lost coolant.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data assigns this pipe to the G20 sedan, G21 Touring, and G28 long-wheelbase 3 Series with the four-cylinder B46D and B48D engines, including the 330i and 330iX. It is specific to the expansion tank connection at the cylinder head. Check your exact model year and drive against the fitment table before ordering.

Technical Details

• Manufacturer: BMW (Genuine)
• Part number: 17-12-8-654-824
• BMW name: pipe, expansion tank to cylinder head
• Sold as: one piece
• Production start: November 2018
• Engines: B46D and B48D
• Country of manufacture: Poland
• Warranty: 24 months

Common Questions

What symptoms point to this hose failing?
Visible coolant leaks around the hose or under the car, overheating during warm-up, and cracks, swelling, or soft spots on the hose.

Does it fit the 330i xDrive?
Yes. Both the 330i and 330i xDrive from 2019–2024 are covered.

Fitment & Compatibility

Compare your production year and trim against the table below. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.