This module is mounted on the bell cover, it reads the RPM of the generator shaft and will disconnect the starter at about 660 RPM and if the generator goes overspeed it will shutdown around 2190RPM (or for 50HZ operation 1830RPM).

These are built by Voigt and Haeffner.

We've been repairing these for years for various BMW and Mini dealerships so we know our way around them pretty well. If you have a dead unit or a PFC error or a Mains error we can repair it.