I was wondering if anyone here has ever had any issues when a device is connected to the OBD2 port when the car is switched off and locked.

I’ve recently fitted a Remus exhaust to my 2015 Mini Clubman Cooper S and it has the bluetooth sound control kit.

The issue I’ve found is that when the ignition is switched off and the OBD2 dongle is still connected, the car alarm will trigger once the car is locked.

It looks like it may be some sort of anti theft deterrent in the coding.

Has anyone else experienced this with any other OBD2 devices left connected to their car and if so was there a solution?

As a workaround I can remove the dongle before locking the car each time (not ideal) or leave it disconnected altogether as the exhaust sound control still works with the Remus remote control button.

Remus don’t seem to have a solution to this.

Thanks