This part is listed by BMW as BMW part number 11287952899 (11-28-7-952-899) and is described as Genuine Mechanical Serpentine Belt Tensioner mounted on the alternator of G20 M340i, M340ix (2019+), G22/G23 M440i (2021+), G26 M440i (2022+), G30 540i, 540ix (2020, 2021, 2022, 2023), G01 X3 M40ix LCI (2022+), G02 X4 M40i LCI (2022+), G05 X5 sDrive40i, X5 xDrive40i (2019, 2020, 2021, 2022, 2023), G06 X6 sDrive40i, X6 xDrive40i (2019, 2020, 2021, 2022, 2023), and G07 X7 40ix (2019, 2020, 2021, 2022).
Only for models with Energy Recovery System (Option Code 01CE)
This is a Genuine BMW B58 belt tensioner 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.
BMW Fitments:
3 Series
G20 (2019+) > M340i
G20 (2019+) > M340i xDrive
4 Series
G22 / G23 (2021+) > M440i
G22 / G23 (2021+) > M440i xDrive
5 Series
G30 (2017-2023) > 540i (B58C 2020-2023)
G30 (2017-2023) > 540i xDrive (B58C 2020-2023)
X3 Series
G01 X3 (2018+) > X3 M40i B58D (2020+)
X4 Series
G02 X4 (2019+) > X4 M40i B58D (2020+)
X5 Series
G05 X5 (2019+) > X5 xDrive40i B58C (2019-2023)
G05 X5 (2019+) > X5 sDrive40i RWD B58C (2019-2023)
X6 Series
G06 X6 (2020+) > X6 sDrive 40i B58C (2019-2023)
G06 X6 (2020+) > X6 xDrive 40i B58C (2019-2023)
X7 Series
G07 X7 (2019+) > X7 xDrive40i B58C (2019-2022)
