BMW 6 Diesel Warning Lights & Locked Error Memory Fix

Hey there! I have some experience working on BMWs, and actually dealt with a similar issue on my 2013 BMW 5 Diesel last year. Love the 6 series too, great choice! When I had multiple warning lights popping up, it turned out to be an undervoltage problem. My mechanic found that the battery wasn't providing enough power to the systems. The repair cost me about 240 Euro, they had to reset the error memory and replace some electrical components. Could you share more details about which specific warning lights you're seeing? Also, have you noticed any other symptoms like slow starts or electrical glitches? This would help me give you more specific advice based on my experience. From what you're describing, it sounds very similar to what I went through, but let's make sure we're dealing with the same issue before jumping to conclusions.

Thanks for your input! My situation seems pretty similar to what you experienced. I'm seeing the check engine light, traction control, and ABS warnings all at once. The car still runs okay but I'm worried about potential damage. Last service was done 3 months ago at 173407 KM, and everything was fine until these warnings started showing up last week. Did your battery also impact multiple systems like this? I'm wondering if I should take it to a specialist or if the regular shop can handle it. Just trying to avoid paying for unnecessary diagnostics if others have already figured out the solution. Just to note, mine started with occasional warning flashes before becoming constant. Did yours follow a similar pattern?

Hey again! Yes, my experience was exactly like that! Those same warning lights, check engine, traction control, and ABS, were all lighting up my dashboard like a Christmas tree. And just like yours, mine started with unusual flashes before becoming a constant issue. The battery problem in my BMW 5 definitely affected multiple systems. What I learned is that these modern BMWs are super sensitive to voltage fluctuations. When the battery started failing, it messed with pretty much all the electronic systems. The car would run fine mechanically, but the computer systems were going crazy. Here's what happened with mine: I first took it to my regular shop, but they actually recommended a BMW specialist because of how the electrical systems are interconnected. Turned out to be the right call, the specialist had the right diagnostic tools and found the issue pretty quickly. Since your symptoms are identical to what I experienced, I'd suggest going straight to a specialist. They'll know exactly where to look, and you'll probably save money in the long run by avoiding multiple diagnostic sessions at different shops. One quick tip, get them to check the alternator too while they're at it. In my case, the alternator was fine, but it's worth checking since it can cause similar symptoms.

Thanks for the detailed follow-up! I really appreciate you sharing your experience with the BMW 5. After hearing about your situation, I'm pretty convinced I'm dealing with the same battery/electrical issue. Those identical warning lights can't be a coincidence. I'll take your advice and skip the regular shop, going straight to a BMW specialist seems like the smart move here. It's actually a relief to hear that it might just be a battery problem rather than something more serious. The fact that your repair cost was reasonable also makes me feel better about the whole situation. Quick question though, after they fixed your car, did all the warnings clear up immediately, or did it take some time? Just want to know what to expect when I take mine in. Also, did you have any recurring issues after the initial fix? I'll make sure they check the alternator too, as you suggested. Thanks again for all the help, it's great to hear from someone who's been through the exact same thing!