BMW M4 Warning Light & Headlight Alignment Issues

Hey there! I had a pretty similar issue with my 2012 BMW M3. Got a decent amount of experience working with cars, but I usually leave the complex stuff to the pros. That headlight problem sounds exactly like what I dealt with. The servomotor in my headlight adjustment system was failing, causing misalignment and throwing error codes. Took it to my regular workshop and they diagnosed it as a faulty servomotor unit. The repair wasn't cheap, set me back about 1040 Euro, but it fixed the problem completely. Before suggesting anything specific for your M4 though, could you share: How long has this been happening? Are both headlights affected? Have you noticed any grinding noise when starting the car? Once you fill me in, I could probably share more relevant details from my experience. By the way, if it is the servomotor, don't wait too long to get it fixed, it can cause other electrical issues down the line.

Thanks for the detailed response! My M4 has been really well maintained (last service was just 2 months ago) and I'm at 66166 KM. The issue started about a week ago, affecting both headlights. Haven't noticed any grinding noise, but there's definitely something off with the automatic leveling system. I appreciate the heads up about potential electrical issues, might get it checked out sooner rather than later. The workshop costs you mentioned are helpful to know. Did you notice any other electrical quirks before getting it fixed?

Oh good to hear back from you! Since you asked about other electrical quirks, yes, actually. Before I got my M3's servomotor fixed, I noticed some weird behavior with the auto-leveling system. The headlights would sometimes readjust themselves out of nowhere while driving, especially when going over bumps. It wasn't dangerous, but definitely annoying. The fact that both your headlights are affected makes me even more convinced it's similar to what I experienced. My issue also started pretty suddenly, even though my car was well-maintained like yours. The workshop told me that these servomotors can fail regardless of maintenance, it's just one of those parts that wear out over time. Since you're not hearing any grinding noise (I did in my case), you might have caught it earlier than I did. That's good news, might save you some cash on related repairs. But here's a tip from my experience: when you take it in, ask them to check the wiring harness too. In my case, they found some minor wear on the connectors that they fixed while they were in there. Didn't cost much extra but probably prevented future headaches. How's the warning light behaving in your case? With mine, it was constant, but I've heard from other M3/M4 owners that it sometimes flickers before the system fails completely.

Thanks this is exactly the kind of detailed experience I was hoping to hear about! The warning light on mine is constant, just like yours was. Really interesting about those unusual readjustments you mentioned, I've noticed something similar when driving at night, but didn't connect the dots until you mentioned it. I think I'll book it in next week to avoid any bigger issues down the line. Your tip about checking the wiring harness is solid, definitely going to mention that when I take it in. Better to get everything sorted while they're working on it anyway. Just hoping my repair bill comes in a bit lower than yours did! Great to hear from someone who's dealt with the same problem. I'll probably update once I get it fixed, in case anyone else runs into similar issues with their M4. Thanks again for taking the time to share your experience, really helped me understand what I might be dealing with.