BMW iX Battery Shutdown: High-Voltage System Alert

I experienced something very similar with my 2019 BMW i3. The symptoms you're describing match exactly what happened to me, sudden power loss and high-voltage system warnings. Last month, I took it to the garage where they diagnosed a faulty battery management system. The main battery pack was heavily discharged and some cells were deteriorating faster than others. They had to recalibrate the entire system and replace several modules in the battery pack. It was definitely a serious issue that needed immediate attention. The tricky part with EVs is finding technicians with proper certification and diagnostic tools. These aren't your regular mechanical problems, they're complex electrical systems that need specialized knowledge. My advice would be to stick with certified EV technicians, preferably at a dealership that regularly handles electric BMWs. The fix worked perfectly, and I haven't had any issues since then. Just don't wait too long, battery problems in EVs can cascade into bigger issues if left unchecked.

Hey, thanks for sharing your experience! It's really helpful to know I'm not alone with this issue. The battery management system problem you described sounds exactly like what I'm experiencing. Just wondering, do you remember roughly how much you ended up paying for the repairs? Also, has everything been running smoothly since the fix, or have you noticed any other quirks? I definitely agree about finding certified technicians. After my last experience with a regular mechanic who clearly wasn't comfortable with EVs, I learned my lesson! Think I'll take your advice and look for someone who specializes in electric BMWs.

Hey there! Happy to update you about the costs and how things are going. Got it fixed last week and it came to 290€, honestly not as bad as I was expecting given how worried I was about the battery issues. The service included a full recalibration of the battery management system and fixing the heavily discharged cells. The best part? The car's running like a dream now! That annoying high-voltage system error message hasn't popped up once since the repair. Super relieved about that. No other quirks or problems to report, it's performing just like when I first got it. You're absolutely making the right call looking for EV specialists. Regular mechanics just don't have the right tools or know-how for these sophisticated electrical systems. Learned that lesson the hard way myself! Let me know if you need any other info about my experience with the repairs. Always happy to help another BMW EV owner!

Thanks for the detailed response! I finally took your advice and got my iX fixed last week. You won't believe this, but I actually found a great certified EV specialist. The whole experience was so different from my previous mechanic nightmare! Turns out it was indeed the battery management system, just like in your case. They had to recalibrate everything and replace a couple of modules. Cost me a bit more than yours, around 400€, but honestly, seeing how well the car runs now, it was totally worth it. The best part? No more unusual shutdowns or error messages! The mechanic also gave me some solid tips about maintaining the battery health. Really glad I didn't put this off any longer. Thanks again for pushing me in the right direction, you saved me from probably making another bad mechanic choice!