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.
Tom
I assume your 'spare unit from Bunny' is a speed sensor. [To avoid any confusion, I have never supplied Turn Signal Modules!] However, with your symptoms, I would suspect that the new TSM may be faulty, or maybe the connectors or wiring leading to it need to be investigated? The speed sensor signal does pass through the TSM on its way to the ECU but I doubt this could affect the tacho reading or cause engine stoppages.
