This part is listed by BMW as BMW part number 12318654280 (12 31 8 654 280) and is described as a new replacement alternator for B46D 4-cylinder and B58C/B58D 6-cylinder. This can be found in most “30i” and “40i” models, including M240i, M340i, and M440i. Also for A90/GR Supra. This is a 150A alternator and includes a new pulley and carbon brush set.
A core charge applies to this purchase. The supply of original parts for rebuilding keeps the final purchase price low. The core must match the part that was supplied in terms of fitment, type, application, accessories, and hardware. Damaged or modified cores will not receive a refund. A core charge can only be refunded once the core has been inspected and approved. Click here for our Core Policy.
This is a Genuine BMW alternator 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+) > 230i
G42 / G43 (2022+) > 230i xDrive
G42 / G43 (2022+) > M240i
G42 / G43 (2022+) > M240i xDrive
3 Series
G20 (2019+) > 330i
G20 (2019+) > 330i xDrive
G20 (2019+) > M340i
G20 (2019+) > M340i xDrive
4 Series
G22 / G23 (2021+) > 430i
G22 / G23 (2021+) > 430i xDrive
G22 / G23 (2021+) > M440i
G22 / G23 (2021+) > M440i xDrive
4 Series
G26 (2022+) > 430i Gran Coupe
G26 (2022+) > 430i xDrive Gran Coupe
G26 (2022+) > M440i xDrive Gran Coupe
5 Series
G30 (2017-2023) > 530i B46D (2020-2023)
G30 (2017-2023) > 530i xDrive B46D (2020-2023)
G30 (2017-2023) > 540i (B58C 2020-2023)
G30 (2017-2023) > 540i xDrive (B58C 2020-2023)
7 Series
G12 (2016-2023) > 740i
G12 (2016-2023) > 740i xDrive
X3 Series
G01 X3 (2018-2024) > X3 M40i B58D (2020-2024)
G01 X3 (2018-2024) > X3 sDrive30i (2020-2024)
G01 X3 (2018-2024) > X3 xDrive30i (2020-2024)
X4 Series
G02 X4 (2019-2024) > X4 M40i B58D (2020-2024)
G02 X4 (2019-2024) > X4 xDrive30i (2020-2025)
X5 Series
G05 X5 (2019+) > X5 xDrive40i B58C (2019-2023)
X6 Series
G06 X6 (2020+) > X6 xDrive 40i B58C (2020-2023)
X7 Series
G07 X7 (2019+) > X7 xDrive40i B58C (2019-2022)
Z Series
G29 Z4 (2019-2025) > Z4 M40i
G29 Z4 (2019-2025) > Z4 sDrive30i