Coolant Vent Pipe, Genuine BMW - 2011 F10 528i (N52)

This part is listed by BMW as BMW part number 17127578405 (17-12-7-578-405) and is described as Genuine BMW Coolant Vent Pipe (Radiator to Expansion Tank) for 2011 528i Sedan (N52 engine).

This is a Genuine BMW coolant pipe with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.