VW Touran Parking Sensors Dead: Repair Guide & Costs

Having dealt with a similar issue on my 2013 VW Tiguan, I can share my experience as someone with moderate car repair knowledge. The radar sensors and ultrasonic sensors on my Tiguan completely failed during parking, showing identical symptoms. After diagnostic testing, the workshop found faulty wiring between the control module and the front sensors, specifically a damaged cable connection that was causing the system to malfunction. The fix involved replacing several corroded plug connections and resolving a wiring issue near the front bumper. Total repair cost was 95€, which covered both diagnostic work and the actual repair. The obstacle detection system has worked flawlessly since then. To better assist with your specific case, could you share: Have you noticed any warning messages on the dashboard? Did the issue start suddenly or gradually? Was there any recent bodywork done near the sensors? Have the sensors been exposed to high-pressure washing? These details would help determine if your issue matches the wiring problems I encountered or if it might be related to the control module itself.

Thanks for the detailed feedback. My issue started gradually over 2 weeks, with parking sensors becoming increasingly unreliable before failing completely. No warning lights appeared on the dash. The proximity sensors stopped working right after the last service at 31343km. The parking assist system had worked perfectly before, but now none of the obstacle detection features respond. Since no bodywork was done and I avoid high-pressure washing near any sensors, I suspect it might be similar to your wiring issue. This feedback helps narrow down potential causes, I will have the wiring connections checked first before replacing more expensive components.

Thanks for those additional details. The gradual failure pattern you describe is very similar to what I experienced with my Tiguan's parking system. When proximity sensors degrade over time rather than failing suddenly, it often points to wiring deterioration rather than a complete sensor failure or control module issue. Since your parking assist stopped working after a service, have the technician check if any cleaning products or fluids may have seeped into the sensor connections during maintenance. In my case, the corroded wiring connections were partially caused by moisture intrusion through tiny cracks in the protective sleeve. The rearview camera might still work even if the parking sensors fail, as they operate on separate circuits. Is your camera system still functioning normally? This could help isolate whether the issue is specific to the ultrasonic sensor circuit. Given the matching symptoms and similar vehicle age, I recommend having a diagnostic test focused specifically on the wiring harness for the front and rear parking sensors. The repair should cost around 100€ if it is indeed just corroded connections like in my case. Let us know what the workshop finds. This kind of gradual sensor failure is quite common in VW models from that era due to the wiring design.

Thanks for helping pinpoint the likely cause. All these details really match my situation. I checked the camera and youre right, it still works perfectly which suggests the wiring to the blind spot sensors and ultrasonic sensors might be the culprit rather than the main control module. I called the workshop and scheduled a diagnostic test specifically for the parking assist wiring. They quoted 90€ for a full system check focusing on the sensor connections. The gradual failure pattern absolutely matches what you described, reliability got worse over time rather than suddenly dying. Ill update once they check the wiring harness and connections. Really hoping its just corroded plugs like in your case rather than needing the whole control module replaced. The fact that moisture intrusion through tiny cracks caused your issue makes total sense given how the problems developed in my car. Really appreciate you sharing your repair experience and costs. It gave me a clear direction to investigate instead of blindly replacing expensive parts.