Spark Plug, BMW - G20 330i/M340i, G29 Z4 30i/M40i
Original spark plug for B46, B48, and B58TU engines. Genuine BMW part #12122455258.
This part is listed by BMW as BMW part number 12122455258 (12 12 2 455 258, SILZKGR8E8S) and is described as Genuine BMW Spark Plug for G20 330i/M340i and G29 Z4 30i/M40i (B46/B48/B58TU engines).
This is a Genuine BMW Spark Plug 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.
G20 (2019+) > 330i
G20 (2019+) > 330i xDrive
G20 (2020+) > M340i
G20 (2020+) > M340i xDrive
G12 (2016+) > 740i
G12 (2016+) > 740i xDrive
G05 X5 (2019+) > X5 xDrive40i
G29 Z4 (2019+) > Z4 M40i
G29 Z4 (2019+) > Z4 sDrive30i