BMW 6 Series Haunted by Random Electrical Failures

I had very similar issues with my 2015 BMW 5 Series diesel. Last month, my car showed the exact same symptoms, unusual audio/nav failures and warning lights flickering on and off. Turned out it was a faulty cable connection to the main control unit that connects to the vehicle's BUS system. The connection had corroded over time and was causing intermittent communication failures between different modules. It's actually a serious issue since it affects multiple systems and can potentially leave you stranded if the connection fails completely. The repair involved replacing the main wiring harness and control unit connectors. Took about 6 hours of labor since they had to remove several components to access the connection points. After the fix, all systems have been working perfectly with no more unusual failures. I'd recommend getting this checked soon since electrical issues tend to get worse over time. Make sure to find a shop that specializes in BMW electrical diagnostics, they'll have the right diagnostic tools and expertise for these complex systems.

I know exactly what you're talking about! Same thing happened with my BMW a while back. Just got it fixed recently actually. Such a relief when all those unusual glitches finally stopped. Hey, do you mind sharing how much you ended up paying for the repairs? And has everything stayed working properly since then, or have you noticed any other quirks popping up? Just wanna know what to expect down the road.

Hey there! Yeah, happy to share, I just had this fixed a few weeks ago and it cost me 155€ for the repair. The mechanic found that corroded cable connection to the control unit I mentioned before, and once they sorted that out, all those annoying glitches completely disappeared. I'm really relieved to say everything has been working perfectly since the repair. No more unusual warning lights, the audio system stays on, and the navigation works like a charm. It was definitely worth getting it fixed properly rather than letting it get worse. Honestly, these electrical gremlins can be super frustrating, but once you find the root cause, it's usually not as complicated as it seems. Just make sure you get someone who really knows their way around BMW electronics, it makes all the difference. So far, no new quirks have shown up, and I'm keeping my fingers crossed it stays that way! The car feels like new again, it's amazing how one dodgy connection can cause so many problems.

Thanks for all that info! Just got back from the mechanic actually. They found the same issue, corroded wiring connections messing with the control unit. Can't believe such a small thing caused so many problems! The repair was pricier than yours though, had to shell out about twice that amount. But honestly, it's worth every penny. My BMW's running like a dream now, no more unusual shutdowns or warning lights flashing at me. The audio system's crystal clear, and the navigation's spot on. Funny how we both had such similar problems. Really glad I asked here before taking it to just any mechanic. Found a great BMW specialist who knew exactly what they were doing. They showed me the corroded bits they replaced, looked pretty nasty. All's well that ends well! Thanks again for pointing me in the right direction with this. Now I can finally enjoy driving without wondering what's gonna go wrong next!