I recently replaced my 2015 M3W's turn signal module with a new one from Morgan, supplied by Morgan Spares. I have a spare unit from Bunny that I kept, "just in case" the Morgan one decided to go on strike.
I now have the tachometer going wild, indicating high RPM, and the engine cutting out completely. I pull off the road, shut the ignition key off, and the engine re-starts immediately.
This problem has become more frequent, and is a safety issue, with the engine cutting out at most inopportune times while in traffic.
I suspect the new turn signal module is at fault, and even though my turn signals are working well, I will be installing the improved Bunny version.
The above non-withstanding, I am asking the knowledgeable members if the wheel speed sensor has anything to do with the tachometer indication, as well as the unwelcome engine stoppages.
Thank you in advance for your information,
Tom
