Has anyone on this thread (or anyone else for that matter) been able to resolve the issue where the exhaust valve simply doesn't work? Mine is permanently stuck open and won't close under any circumstance. The BMW Tech's at my dealership are stumped too. Appears it never worked right from the factory.
I did a more detailed write-up about it on
Post #13 in this thread:
https://f87.bimmerpost.com/forums/sh....php?t=1516177
The response we got from the PuMA BMW Tech was quite amusing.
*I have the Dinan exhaust/res delete combo and the ASD Bypass installed (not that it should matter for the valve functionality though).