[philisme]

I have the same "problem". The exhaust valve on my M2 stays OPEN, I can't see it closed.

After installing the Akrapovic exhaust system, the valves (Akrapovic provide a second flap with an harness and a control module to connect it) stay OPEN all the time. (I didn't buy their "Sound Kit" aka "remote control").

I thought the problem came from Akrapovic module, so I disconnected all the Akrapovic hardware and reconnected the valve as stock, but it won't close...