This part is listed by BMW as BMW part number 17129845173 (17 12 9 845 173) and is described as URO expansion tank vent hose for F22 230i, F30 330i, F32 430i models with the B46 engine. This runs from the cylinder head to the expansion tank.
Replaces the following obsolete BMW part numbers:
17125A05950 (17-12-5-A05-950)
17128740118 (17-12-8-740-118)
17128677244 (17-12-8-677-244)
17128616536 (17-12-8-616-536)
This part is manufactured by an aftermarket supplier of European auto parts, including many driveline components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.
BMW Fitments:
2 Series
F22 / F23 (2014-2021) > 230i
F22 / F23 (2014-2021) > 230i xDrive
3 Series
F30 / F31 / F34 (2012-2019) > 330i
F30 / F31 / F34 (2012-2019) > 330i xDrive
4 Series
F32 / F33 / F36 (14-20) > 430i
F32 / F33 / F36 (14-20) > 430i xDrive
