M2 Electrical Chaos: Nav Dead, Multiple Warning Lights

I dealt with something very similar on my 2016 M4 last year. The control unit was throwing multiple electrical errors, navigation system crashed constantly, and I had unusual warning lights popping up on the dash. After thorough diagnosis, it turned out the main control module had corrupted software. The fix required a complete reprogramming of the control unit and updating all module firmware to the latest version. It was quite a serious issue since the car's entire electrical system was affected. The problem was too complex for regular mechanics, had to get it fixed at a specialist who really knew BMW electrical systems. They had to use specific diagnostic tools to properly reprogram everything. The whole process took about a day and a half, but it solved all the issues completely. Based on your symptoms, it sounds exactly like what I experienced. You'll want to find someone who specifically deals with BMW electronics and programming. Regular mechanics often can't handle these complex software issues.

Thanks so much for sharing your experience, this sounds exactly like what I'm dealing with! Really helpful to know it was a software issue that got resolved with reprogramming in your case. Just wondering, do you remember roughly how much the repair ended up costing you? And has everything been working properly since the fix? My M2 is my daily driver so I'm hoping to get this sorted quickly without breaking the bank!

Hey again! Yes, absolutely, after getting it fixed at the specialist, my M4 has been running perfectly with zero electrical issues. The whole software reprogramming job cost me 240 € which honestly wasn't as bad as I expected given how serious the problem seemed. They basically had to do a complete reset and reprogramming of the control unit since it was giving those implausible readings. I've put about 15,000 km on it since the fix and haven't had a single glitch, nav works perfectly, no more unusual warning lights, everything's back to normal. The mechanic explained that these newer BMWs can sometimes develop software corruption issues that mess with multiple systems, but once properly reprogrammed, they're good to go. Definitely get it looked at soon since you're daily driving it. Just make sure you find someone who really knows their stuff with BMW electronics. The proper diagnostic equipment makes all the difference with these software-related problems. Trust me, it's worth getting it done right!

Update: Finally got my M2 sorted! Found a great specialist mechanic who diagnosed it as a corrupted control module, just like your M4. The whole reprogramming process took about 8 hours but the results are amazing. All the electrical gremlins are gone, nav's working perfectly, no more warning lights, and everything's running smoothly again. Cost was similar to what you paid, around 250. Such a relief it wasn't something more serious! The mechanic did a thorough job explaining everything and even showed me the diagnostic readings before and after. Really glad I took your advice about finding someone who specializes in BMW electronics. Can't believe I was stressing so much about this. The car feels like new again and I'm back to enjoying my daily drives. Thanks again for pointing me in the right direction with your experience, saved me a lot of headache trying to figure this out on my own!