This part is listed by BMW as BMW part number 11311312535 (11 31 1 312 535) and is described as the exhaust cam gear used on S38 engines in the E28 M5, E34 M5, and E24 M6. It was also used on the Sport Evo III version of the E30 M3 and can be retro-fitted to other S14 engines to improve torque in the mid-range.
Replace the sprocket if the teeth are sharp or have significant polishing.
Also buy the updated lock ring, BMW part #11311305070, or buy the complete kit from us with valve cover gaskets (
click here).
This is a Genuine BMW exhaust cam gear 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: 3 SeriesE30 (84-91) > M3
