BMW 7 Series Keyless Entry Failure: Battery System Alert

I had a similar issue with my 2020 BMW 5 Series Hybrid last month. The symptoms were almost identical, keyless entry failure and battery warnings. Turned out the door handle sensor module had a damaged cable connection that was causing intermittent electrical issues. Had it checked at the dealer's garage and they found corrosion in one of the main connector plugs that links the door handle electronics to the central locking system. The fix wasn't too complex, but it required specialized diagnostic equipment to properly identify the fault. They had to replace the door handle wiring harness and reprogram the comfort access module. Not a cheap job since it's part of the car's security system, but definitely worth getting it done right. It wasn't a serious mechanical issue, but these electronic glitches can be really frustrating. My advice is to get it checked at a certified BMW service center since they have the right diagnostic tools for these newer hybrid models.

Thanks for sharing your experience! This sounds exactly like what I'm dealing with. Really helpful to know about the connector plug corrosion, that could definitely explain my issues. I've been worried it might be something more serious with the hybrid system. Do you remember roughly how much the repair ended up costing you? Also, have you had any other electronic glitches pop up since they fixed it? Been debating whether to just go straight to the dealer or try an independent shop first.

Hey again! Happy to give you an update. After I took it to the mechanic, the door handle electronics issue was completely fixed, such a relief! The total came to 95 € which wasn't bad at all. Turned out it was just a faulty cable connection that needed sorting, way simpler than I initially thought. Since getting it fixed, everything's been working perfectly, no more keyless entry problems or those annoying battery warnings. Honestly, going to a certified shop was the right call because they knew exactly what they were looking for with these hybrid models. I know some try independent shops to save money, but for these electronic issues in newer BMWs, I'd really recommend heading straight to someone who specializes in them. The diagnostic equipment they use makes such a difference in getting it right the first time. Just make sure whoever works on it knows their way around hybrid systems, that's crucial. But based on what you're describing, sounds like you might be dealing with the same thing I had. Should be a pretty straightforward fix once they get into it!

That's fantastic news about the repair cost! After hearing your experience, I actually took my car in yesterday. You were spot on, it was indeed a wiring issue in the door handle module. The mechanic I chose specializes in European cars and hybrid systems, and they sorted it out pretty quickly. The bill came to a bit more than yours since they had to replace an additional connector, but still way less than I was expecting. The best part is the keyless entry is working perfectly now, and all those dashboard warnings have disappeared. Really glad I asked here first instead of stressing about it more. Thanks again for steering me in the right direction! You saved me from probably spending way more time and money trying to figure this out.