Dead BMW i5 Screen: MOST Bus Failure Solutions Needed

I had a similar issue with my BMW i4 (2021) last month. The MOST bus failure caused my entire infotainment system to go dark. After diagnosis at the service center, they found a faulty control unit that was disrupting the entire media/communication network. The repair involved replacing the fiber optic ring controller and reprogramming the system. It was definitely a serious issue since the MOST bus controls pretty much all entertainment and comfort functions. In my case, the repair took two days because they needed to order the specific part. I'd strongly recommend getting this checked ASAP because if it's indeed a MOST bus problem, it can potentially affect other connected systems in your car. The symptoms you're describing match exactly what I experienced, complete blackout of all infotainment functions. The good news is that once fixed, everything worked perfectly again with no recurring issues. Make sure you go to someone who specifically knows BMW electric vehicles, as these systems are quite complex and model-specific.

Thanks for sharing your experience! This definitely sounds similar to what I'm going through right now. I'm relieved to hear yours was fixed without any further complications. Would you mind telling me roughly how much you ended up paying for the repair? Also, have you had any other electrical glitches since they fixed it? Really want to make sure I'm prepared before I take it in.

Hey there! Happy to give you an update. The repair cost me 1000 € to get that faulty control unit in the MOST bus replaced, and I have to say it was totally worth every cent. Since getting it fixed, my car's been running like a dream, no more black screens or system failures! You know how annoying it was when nothing worked, right? I can honestly say I haven't had even the smallest glitch since the repair. Everything's working exactly as it should, my music, nav system, the whole lot. It's such a relief not having to deal with a dead infotainment system anymore. I was pretty nervous about the repair at first, just like you are now, but it turned out to be a straightforward fix once they identified that specific control unit was the culprit. If your symptoms are the same as what I had, you're probably looking at a similar repair. Trust me, it's better to get it sorted sooner rather than later. The MOST bus issue isn't something that fixes itself! Feel free to ask if you need any other details about the repair. I know how stressful these electronic issues can be, especially in these high-tech cars.

Finally got my car back from the mechanic today, and I'm so glad I took your advice! Turns out it was exactly what you described, a faulty MOST bus control unit. Found a different mechanic who specializes in BMW electrics, and honestly, what a difference in service quality! The repair was slightly pricier than yours at 1200 €, but they did a thorough job. They even updated some software while they had it in the shop. The whole thing took about three days because they had to order the part, but it was worth the wait. Everything's working perfectly now, the screen, navigation, sound system, all of it. Such a relief not having to drive around with a dead system anymore! Really appreciate you sharing your experience, it helped me know what to expect and gave me the confidence to get it fixed properly this time. Thanks again for your help! Honestly, I should've just gone to a specialized mechanic from the start instead of trying to save money with that first place. Lesson learned!