VW Tiguan Door Lock Failure: Sensors vs Wiring Issue

Had exactly this happen on my VW Passat 2020 TDI. After dealing with car door sensor issues and complete failure of the central locking, I took it to a workshop where they diagnosed a faulty door switch connection. The issue was similar, no response from any doors when using remote or central locking. The door latch mechanisms worked fine manually, but the electrical components were completely unresponsive. The workshop found that the cable connection to the main door sensor had deteriorated, causing the system to fail. They had to partially disassemble the driver door panel to access and repair the wiring. Total repair time was about 2 hours and cost 95€. To provide more specific advice for your Tiguan issue: Which door started showing problems first? Does the key fob still light up when pressing buttons? Can you hear any clicking sounds from the door latches when attempting to lock/unlock? This could help determine if your issue matches what I experienced. These car sensor problems often start with one door before affecting the entire system. The door switch connections are common failure points in VAG vehicles, but its worth confirming the exact symptoms before assuming its the same issue.

Last serviced at 57016km. Thanks for the detailed comparison. Based on the symptoms, my issue seems very similar. The automatic locks stopped working suddenly on all doors simultaneously, no gradual failure. The key fob still lights up normally but there are no clicking sounds from any door latches when pressing the buttons. The electrical issue appears identical to what you described with the door sensor connection. Given our cars are from the same manufacturer group and share similar central locking systems, this gives me a good starting point for the repair. Can you confirm if your workshop had to update any control modules after fixing the wiring? Also wondering if they found any corrosion around the door sensor connections when they opened things up.

Thanks for following up about your Tiguan locking issue. On my Passat, the workshop actually didnt need to update any control modules after fixing the wiring harness. The door sensor connection repair alone restored full functionality to the central locking system. When they opened up the door panel, they did find some minor corrosion around the contact signal points, which had contributed to the electrical issue. The technician cleaned the connections thoroughly before installing the new wiring section. Since your symptoms match mine exactly, working key fob light but no door latch response, it strongly suggests the same door sensor problem. The sudden failure across all doors is also consistent with a main wiring harness issue rather than individual door sensors failing. One tip: make sure the workshop checks the main ground connection for the door contact system while theyre in there. In my case, they found this was also slightly compromised, which could have eventually caused the problem to return if left unaddressed. The repair has held up perfectly for the past 8 months with no recurring electrical issues in any of the vehicle doors.

Really appreciate all those extra details about your repair experience. The matching symptoms with your Passat case make me more confident about the likely cause being the door sensor wiring. Good to know about checking the ground connection too, will definitely mention that to the workshop. My car is still under warranty at 57016km, so I will have the dealer investigate the wiring harness and door switch connections first. The fact that your repair has lasted 8 months without issues is reassuring. Will inspect for corrosion around the contact signal points as well, since that seems to be a common factor. Based on your experience, I should be able to get the vehicle doors working properly again with similar repairs. Planning to book it in next week and will specifically ask them to examine the main door sensor wiring and clean all electrical connections thoroughly while they have it apart. The 2-hour repair time you mentioned helps set realistic expectations. At least I know the central locking system can be fixed without major component replacements, assuming the issue is indeed in the wiring like yours was.