Turbo Oil Supply Line, BMW - 135i/M235i/M2/335i/435i/535i, 640i/740i, X1/X3/X4/X6 35i N55

This genuine BMW oil line replaces the top oil supply line on the 135i/M235i/M2/335i/435i/535i, 640i/740i, X1/X3/X4/X6 35i N55 turbocharger. New rubber o-rings are included.

Oil leaks on the N55 turbo can come from a number of places and the oil lines to the turbos are one of more likely. Usually it's the o-rings where the line attaches to the turbo housing. But in some cases a leak remains even after replacing the turbo oil line seals and in those cases it's probably the line itself. BMW uses a braided stainless steel line with metal ends crimped on and leaks develop from inside the crimps. The most cost effective fix is to replace the leaking N55 oil lines with new factory lines.

This part is listed by BMW as BMW part number 11427585402 (11-42-7-585-402) and is described as Genuine BMW Turbo Oil Supply Line, N55 Engine.

This is a Genuine BMW oil line 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.