Hi, all. I have a 2008 535xi with the CCC iDrive and on occasion the iDrive will restart.. this does not happen often. My main issue is that the audio cuts out under hard acceleration and sometimes even when going over bumps after a few hard pulls. When it goes out after a bit the SOS malfunction pops up and I've learned that slamming on the brakes will help bring it back sometimes. The problem is worse in the summer on warm days, in around 80 F weather I've gotten in the car and had no audio. If I drive the car easy now in the winter it will not go out for the whole drive. I have the satellite module bypassed and have checked the little optical loop that bypasses the module's connection and it appeared to be okay. Replaced the Bluetooth module with a used one from the junkyard - same issue. Any thoughts on what could be causing this?

 

Thinking it was actually the MOST loop bypass for the satellite module.. I replaced it, drove the car twice and it has not gone out. I rechecked the old one not sure how that could have been causing it but hoping it's good.