Audi S7 Central Locking Failure: Common Fix Guide

As someone with some experience working on Audis, I encountered a similar issue with my 2014 Audi S6. The car locking mechanism completely failed, leaving me unable to use the key fob or interior controls. After troubleshooting attempts, I took it to a workshop where they identified the problem as a faulty wiring connection in the locking system. The issue was traced to corroded plug connections between the door control module and the central locking system. The repair involved cleaning the connections and replacing some damaged wiring, which cost 95 Euro including diagnostic work. The car alarm system was also affected initially, but once they fixed the wiring connections, everything returned to normal operation. These problems often stem from moisture getting into the connections over time. Before suggesting more specific solutions, could you provide: Have you noticed any other electrical issues recently? Does the key fob battery have sufficient power? Are there any visible signs of water damage around the door panels? Have you checked the fuse box for any blown fuses related to the central locking? These details would help determine if your issue matches what I experienced or if it might be something different.

Thanks for sharing your experience. My Audi has 144711 KM and recently had its annual service. After checking the fuse box, all fuses related to the locking mechanism appear intact. The key fob has a new battery, but the car security system still fails to recognize any commands. I have not noticed other electrical issues, and the door panels show no water damage. The central locking problem started suddenly during a normal drive. Would checking the door control module connections be a good first step before taking it to a workshop?

Based on your mileage and symptoms, this definitely sounds similar to what I experienced with my Audi S6. Since youve already checked the basic elements like fuses and the key fob battery, examining the door control module connections would be a logical next step. In my case, the sudden failure of the remote locking system during normal operation pointed to an electrical connection issue rather than a mechanical problem. The workshop found that the wiring harness connecting to the door control module had developed corrosion despite no visible external water damage. Before going to a workshop, you could: 1. Check if the door handle sensors are clean and free from debris 2. Listen for any clicking sounds from the central locking when attempting to lock/unlock 3. Inspect the visible wiring near the door hinges for any signs of wear However, since your car security system is showing an error code, you will eventually need professional diagnostic equipment to properly identify the issue. In my experience, attempting to fix the keyless entry system without proper diagnosis might lead to more complications. While my repair was relatively straightforward at 95 Euro, costs can vary if additional components of the locking mechanism need replacement. The good news is that these issues rarely require complete system replacement.

Thanks for the detailed info. I checked the door handle sensors and wire connections as suggested, found no obvious issues, but I did notice the clicking sound is much weaker than normal when trying the door locks. Given the error code and the weak clicking, I'll schedule an appointment with a workshop for proper diagnostics. Really hope it turns out to be just corroded connections like in your case rather than a full door control module replacement. The car alarm still functions, which seems like a good sign that the issue might be isolated to the central locking system wiring. Will definitely have them inspect those door hinge wire areas you mentioned. I appreciate the troubleshooting guidance, saved me from potentially making things worse by trying more extensive DIY repairs.