This part is listed by BMW as BMW part number 17128654854 (17 12 8 654 854) and is described as the lower radiator hose that carries cooled coolant from the radiator to the main water pump. It also has a connection to the turbo cooling aux water pump. Fits G20 M340i, G22/G26 M440i, and G42 M240i (B58D and B58TU engine).
This is a Genuine BMW B58 cooling 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
G42 / G43 (2022+) > M240i
G42 / G43 (2022+) > M240i xDrive
3 Series
G20 (2019+) > M340i B58D (2019-2024)
G20 (2019+) > M340i xDrive B58D (2019-2024)
4 Series
G22 / G23 (2021+) > M440i B58D (2021-2024)
G22 / G23 (2021+) > M440i xDrive B58D (2021-2024)
4 Series
G26 (2022+) > M440i xDrive Gran Coupe B58D (2022-2024)
