VW Fox Door Locks Dead: Common Control Module Issue

Dealt with an identical issue on my 2012 VW Polo diesel last year. Having moderate experience with car electronics, I first suspected a door sensor malfunction but it turned out to be more complex. After thorough diagnosis at the workshop, they found a damaged wiring harness connecting to the door latch mechanism. The wire insulation had worn down over time, causing intermittent failures in the central locking system. The vehicle doors would out of nowhere stop responding to both key fob and interior switch commands. The repair involved replacing a section of the wiring harness and reconnecting the door sensor properly. Total cost was 95€ and took about 2 hours to complete. The car alarm system also started working more reliably after this fix. To better assist with your specific case, could you share: Does the key fob still work occasionally or completely dead? Are all doors affected or just specific ones? Have you noticed any other electrical issues like interior lights or power windows acting up? Does the car alarm still function properly? These details would help determine if you are facing the same wiring harness issue or if it might be a different component in the central locking system.

Thanks for sharing your experience. My key fob is completely unresponsive, and all automatic locks are affected. No other electrical issues present, power windows and interior lights work fine. Last service was at 131731km and everything was normal then. After reading about the wiring harness issue, I checked the door connections more carefully. Found some signs of wear near the driver side door latch, which matches what you described. The car alarm still works intermittently, sometimes triggering without reason, which could point to a similar electrical issue with the wiring. Planning to have the workshop inspect the wiring harness and door switch connections. Hopefully it will be a straightforward fix like in your case rather than needing a full door sensor replacement.

Good to hear you found some potential wear points in the wiring. Those symptoms align closely with what I experienced, especially the unusual car alarm triggers, which were quite frustrating before the repair. Based on the wiring wear you found near the driver door latch, it does sound like the same harness issue. When my contact signal started failing, the automatic locks stopped responding in a similar pattern. The fact that other electrical systems are working normally further supports this diagnosis. The intermittent car alarm behavior was actually one of the key indicators that helped the technicians pinpoint the failing door sensor connections in my case. They mentioned that worn wiring often causes these false triggers before the central locking system fails completely. For reference, my repair bill included: Wiring harness section replacement: 45€, Labor costs: 50€, Total time: Just over 2 hours Since your symptoms match so closely, you should expect similar repair costs and timeframe. Make sure they check all door sensor connections while they have it apart, sometimes there can be wear in multiple spots.

So I found additional wear points in both rear doors upon closer inspection. The wiring damage seems worse than initially thought. Definitely going to have all door switch connections checked during the repair since multiple spots show similar deterioration. The unusual car alarm triggers have become more frequent this week, happening almost daily now. Given all the symptoms and your repair experience, I am fairly confident it is indeed a wiring harness issue affecting the entire automatic locks system. Will schedule the repair next week and ask them to thoroughly inspect all door sensor wiring while fixing the main electrical issue. The 95€ total cost seems reasonable for the work involved. Thanks for helping me narrow down the problem, saved me from potentially replacing components that were not actually faulty. Let me know if you run into any other electrical issues with your vehicle in the future. This type of troubleshooting feedback really helps identify common failure points in these models.