BMW X7 Seat Controls Dead: Troubleshooting Power Failure

Hey there! I had some experience with electrical issues on my 2020 BMW X5 (also happened to my 's X3). I have some experience working on cars, mainly basic maintenance and electrical stuff. The symptoms you're describing sound very familiar, I had pretty much the same problem last year. After dealing with similar seat control issues, it turned out my battery was severely discharged. The workshop did a full diagnosis and discovered the battery wasn't holding charge properly anymore, causing all sorts of electrical gremlins, especially with the comfort features. Got it fixed at my local workshop, they replaced the battery and recalibrated the seat memory system. Cost me around 290 Euro, but it solved the problem completely. No issues since then. Before suggesting anything specific for your case, what's your battery age and have you noticed any other electrical quirks lately? Also, did you get any specific error codes? This info would help determine if you're facing the same issue I had.

Thanks for sharing your experience! Mine's still fairly new at 53182 KM from the latest service, so I'm a bit surprised to face these issues already. No other electrical problems so far, and the battery seems fine, all other systems are working normally. The error code I'm getting is E-4582 specifically for the seat module. Interesting that yours was battery-related though. I'm starting to wonder if it might be a faulty control module or wiring issue instead, given the age of my car. Did your workshop mention how they narrowed down the battery as the culprit? Might help me decide whether to push for a module check first before looking at the battery.

Hey again! Thanks for the extra details about your X7. You know, now that you mention the E-4582 code and the mileage, I'm thinking this might be different from what I dealt with. In my X5, the battery issue affected multiple systems, but you're only seeing problems with the seat module, which is telling. Looking back at my experience with electrical issues, and knowing what I know now, this does sound more like a control module problem. When my workshop diagnosed my battery issue, they saw voltage fluctuations across multiple systems, that was their big clue. But your case seems more isolated to just the seat functions. I'd definitely push for a module check first. Since your car's fairly new with decent mileage, and there are no other electrical gremlins, focusing on the seat module makes more sense. Could save you some time and money rather than going down the battery replacement route like I did. Quick question, does your seat make any noise at all when you try to adjust it? Mine made a slight humming sound even when not working properly, but that might help pinpoint if it's purely electrical or if there's a mechanical component to the problem too.

Thanks so much for the detailed follow-up! Yeah, there's actually no sound at all when I try to use the controls, completely dead silent. That's really helpful to know about the differences between your battery issue and what I'm experiencing. Makes me feel more confident about pushing for the module check first. Think I'll book it in next week and specifically request they look at the module before anything else. At least this way I won't waste time checking the battery when all signs point to something more specific. Plus, since it's such a new car, I'm hoping this might even be covered under warranty. Really appreciate you sharing your experience, it's definitely helped me figure out a better approach to getting this fixed. Will probably update the thread once I get it sorted in case anyone else runs into the same issue!