VW Eos Telematics Failure: SOS System Alert Fix Needed

I had a similar issue with my 2009 VW Passat last year and can share my experience (some automotive electronics experience from DIY repairs). The diagnostic codes pointed to emergency call system problems, with SOS signal failures and call failure alerts appearing regularly. After trying system resets like you did, I took it to a workshop where they diagnosed a faulty wiring connection to the telematics control unit. The issue turned out to be a damaged cable and loose plug connection that was causing intermittent communication problems with the emergency call module. The repair involved replacing the affected wiring section and properly securing the connection points. Total cost was 95€ for parts and labor. Before suggesting specific fixes, could you share: Have you scanned for specific diagnostic codes? Are there any other electrical issues like intermittent dashboard lights? Did these problems start suddenly or develop gradually? Has the car been in any accidents or had previous telematics repairs? This information would help determine if your issue matches what I experienced with my Passat or if it might be something different in the automotive electronics system.

After my latest service at 14321km, my Eos started showing these telematics issues. Thanks for sharing your experience. I checked the diagnostic codes yesterday and they specifically point to the SOS signal malfunction and call failure alerts, similar to what you described. The problems started gradually over the past month, and no other electrical issues are present. The dashboard works fine except for these emergency call related warnings. The car has never been in an accident or had any control module repairs before. The similarity to your case with the wiring connection makes me think this could be the same issue. Going to schedule a workshop visit to have them check the telematics system wiring and connections to the emergency call module.

Good to hear you ran the diagnostics. The symptoms you describe with the gradual onset of telematics issues and clean accident history match exactly what I experienced with my Passat. The timing after your service visit suggests a possible connection. During routine maintenance, technicians often need to access areas near the control module wiring harness, which could have inadvertently disturbed some connections. This happened with my car too, the call failure warnings started showing up about two weeks after a major service. Since your diagnostic codes mirror mine and point specifically to SOS signal problems, I strongly suspect you are dealing with the same wiring connection issue. The automotive electronics in these VW models from that era used similar telematics system layouts, making them prone to the same failure points. When you take it to the workshop, ask them to specifically inspect: The main wiring harness connection to the telematics control module, The ground connection points, The SOS module connector integrity The system reset not working further supports this being a hardware rather than software issue. The repair should be relatively straightforward once they locate the exact connection point causing the call failure alerts.

Thanks for the detailed follow-up information. Your explanation about checking the main wiring harness and ground connections is exactly what I needed to hear. The timing after my service does make me suspicious that something got disturbed during the maintenance work. I will definitely mention these specific points about the telematics control module wiring and SOS module connections when I take it in. The system reset failing to fix the emergency call problems does suggest a hardware issue like you mentioned. Hopefully the repair costs will be similar to what you experienced. I have scheduled the workshop visit for next week. Will make sure they focus on inspecting those connection points you listed, especially since the diagnostic codes match what you encountered. Really appreciate you sharing your experience with such specific details about the control module wiring checks needed. Just to be thorough, I will get another full diagnostic scan done before the appointment to see if any new error codes have appeared. But since everything points to the same wiring issue you had, I am feeling much more confident about getting this resolved.