2005 Touran 2.0tdi door lock / central locking issues


Hello, the above car has the following issues: When the central locking is activated on the key the only doors to lock are the tailgate and the passenger side rear door. The central locking activates the alarm and if you open one of the defective doors then the alarm blinkers flash.


The same happens when the central locking button is pressed on the drivers door, just the tailgate and rear passenger door lock.


The drivers door will lock and unlock with the key in the door barrel.


Where would you suggest I start looking?


Is it possible that 3 door locks have failed near simultaneously?