This part is listed by BMW as BMW part number 11127850244 (11 12 7 850 244) and is described as the valve cover vent hose on S55 engines in F87 M2, F80 M3, and F82/F83 M4. This is the vent hose for the oil separator/crankcase vent system that purges oil vapor back into the intake for the front turbo. It's vital that this hose is not blocked or gummed up with oil residue to ensure proper oil vapor venting.
This is a Genuine BMW S55 vent hose 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.
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
BMW Fitments:
2 Series
F87 (2016-2021) > M2 CS Racing
F87 (2016-2021) > M2 Competition S55 (2019+)
3 Series
F80 (2015-2018) > M3 (2015-2018)
4 Series
F82 / F83 (2015-2020) > M4 (2015-2020)
F82 / F83 (2015-2020) > M4 GT4
F82 / F83 (2015-2020) > M4 GTS