BMW 5 Series Central Lock Failure After Service Visit

Hey there! I had a similar issue with my 2016 BMW 7 Series Hybrid last month. The central locking problem turned out to be a faulty wiring harness connection near the driver's door module. Got it checked at the garage, and they found corrosion on the plug contacts that was interrupting the signal. They had to clean the connections and replace a damaged section of the wiring harness. It wasn't a major mechanical issue, but it needed proper diagnosis because these systems are interconnected. The repair wasn't too complex, but required specific diagnostic tools to properly identify the fault codes. The job took about 3 hours total. My advice would be to get it checked at a certified shop that has experience with BMW electrical systems. Make sure they do a complete diagnostic scan, as sometimes these symptoms can be related to other control modules. BTW, your mileage is quite low, so this could still be covered under warranty, worth checking that first.

Thanks for sharing your experience! Really helpful to hear about the wiring harness being the culprit. If you don't mind me asking, what did the repair end up costing you? And have you had any other electrical gremlins pop up since they fixed it? I'm trying to gauge if I should expect any other related issues down the line.

Hey again! Happy to give you an update. After my previous post, I actually took my car to get it fixed. It cost me 95 € to repair, turned out to be just a loose cable connection that needed proper fixing. Much simpler than I initially thought! Since getting it sorted, the central locking has been working perfectly, no more issues at all. To answer your question about other electrical problems, nope, haven't seen any other gremlins pop up since the repair. Everything's been running smoothly. It really was just that one isolated issue with the connection. Honestly, I was worried it might be something more serious (and expensive!) when it first happened, but it turned out to be a pretty straightforward fix. Trust me, I totally understand the concern about potential future problems, but in my case, it really was just that one loose connection causing all the drama. The car's been running like a charm since then. Just make sure whoever looks at yours does a proper diagnostic check first, that's what helped identify the exact problem in my case.

Thanks so much for all the details! I went ahead and got my car checked out yesterday. Turned out my issue was actually a blown fuse connected to the door lock system. The mechanic found it during the diagnostic scan. Much cheaper fix than I was expecting, only paid for an hour of labor plus the fuse replacement. The funny part was watching the mechanic's face when he discovered such a simple solution. He initially thought it might be something major with the control module. I was so relieved! The car's working perfectly now, all doors locking and unlocking like they should. Really glad I asked here first instead of going back to that questionable shop. They probably would've tried selling me a whole new locking system or something. Sometimes the simplest solution is the right one! Thanks again for helping me avoid unnecessary stress and expense.