This part is listed by BMW as BMW part number 17127521775 (17-12-7-521-775) and is described as Rein Coolant Expansion Tank Vent Pipe for E60/E61 525i, 525xi, 528i, 528xi, 530i, 530xi (2006-2010), E60 545i (2005) and E63/E64 645Ci (2005).
This hose connects the radiator to the upper fitting on the coolant expansion tank.
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
BMW Fitments:
5 Series
E60 / E61 (04-10) > 525i N52 (2006-2007)
E60 / E61 (04-10) > 525xi N52 (2006-2007)
E60 / E61 (04-10) > 528i
E60 / E61 (04-10) > 528xi
E60 / E61 (04-10) > 530i N52 (2006-2007)
E60 / E61 (04-10) > 530xi N52 (2006-2007)
E60 / E61 (04-10) > 545i
6 Series
E63 / E64 (04-10) > 645Ci
