BMW iX3 Warning Light Chaos: Multiple System Alerts

Hi there! I've got some experience with EVs and their electrical quirks. I had a similar issue with my 2020 BMW i4 (also got an iX in the family). Being upfront, I'd rate my experience level as moderate with EVs. Last winter, I faced almost identical symptoms, multiple warning lights and error codes. Turned out to be an undervoltage problem that was messing with various systems. Took it to my workshop and they diagnosed it properly, cost me around 240 Euro to fix, mainly because they had to recalibrate several sensors and reset the system. Before you go further with diagnostics, could you share: What specific warning lights are you seeing? Did this start suddenly or develop gradually? Have you noticed any changes in charging behavior? This could help pinpoint if you're dealing with the same issue I had.

Thanks for sharing your experience! My iX3 just hit 37327 KM and had its last service about 2 months ago. The warning lights started flashing out of nowhere last week, mainly the drivetrain malfunction and battery system warnings. It's definitely sudden, and yes, I've noticed the charging is a bit slower than usual, taking about 20% longer to reach full charge. Really interesting about the undervoltage issue you had. The symptoms sound pretty similar to what I'm experiencing. Before heading to the workshop, did you try any basic troubleshooting like a system restart or checking the 12V battery? Just trying to avoid an unnecessary service visit if there's a simple fix.

Hey again! Thanks for those details about your iX3. You know, hearing about your charging slowdown really rings a bell, that's exactly what happened with my i4 before things got wonky. And those warning lights you mentioned? Spot on with what I experienced. I actually did try some DIY fixes before taking it to the workshop. First thing I did was a complete system restart (holding down the start button for about 20 seconds), but that only cleared things temporarily. Then I checked the 12V battery, which was showing slightly low voltage readings. That's when I knew it wasn't going to be a quick fix. Here's something I learned from my experience, while these issues might seem similar to the undervoltage problem I had, it's really tricky with these high-tech EVs. They're basically computers on wheels, and sometimes what looks like a simple electrical issue can be more complex. Since you mentioned the recent service, I'd give the workshop a call. Could be something they disturbed during the service that's causing these symptoms. When I finally took mine in, turned out the battery management system needed a proper recalibration. These cars are pretty sensitive to any changes in their electrical systems. Mind keeping us posted on what you find out? Always good to learn from each other's experiences with these machines.

Thanks for all that detailed feedback! I actually tried the system restart you suggested right after reading your message, held down that start button for 20 seconds. Didn't fix it completely, but the warning lights stayed off for about an hour before coming back. You're absolutely right about these cars being computers on wheels. I've gone ahead and booked a workshop appointment for next week. Just did a voltage check on the 12V battery like you mentioned, showing 11.8V, which seems a bit low from what I understand. Given the similar symptoms to what you experienced, I'm betting it might be related to that battery management system you mentioned. Really appreciate you taking the time to share your experience, definitely helped me understand what I might be dealing with. I'll make sure to update the thread once I get it sorted. These EVs are amazing when they work right, but their electrical issues can be tricky to diagnose! At least I'm going into the workshop visit with some knowledge about what to expect.