Expansion Tank Vent Line, BMW - G30 540i B58C, G12 740i, G15 840i

This part is listed by BMW as BMW part number 17128678503 (17 12 8 678 503) and is described as the coolant vent hose from the engine to the coolant reservoir on 2020+ G30 540i, G12 740i, and G15 840i with the B58C engine.

This is a Genuine BMW B58 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.