To begin you will need to remove the door panel.
Audi a4 rear door lock problem.
Like almost every other feature in an audi the door locks are more electronic than mechanical and require a bit of coding to work correctly.
Furthermore there may be a problem with the tumblers in the lock itself.
This article applies to the audi a4 b7 b8 2005 2015.
If you have access to the vag com software try using it to access the door locking module electronically and resetting it to the default for your car.
Covering the diagnosis and repair of a faulty lock module on my b8 a4 avant 2008 these lock modules are used in several vag models which probably all suffe.
This video is applicable to the 02 03 04 05.
Door lock problems diagnostic guide.
If you notice that despite being not terribly far away from the car it is not reacting to the queue to lock unlock the vehicle then it might be time to replace the fob battery.
This can prevent the door from opening at all whether it s locked or not.
Audi a4 b7 b8 door lock problems diagnostic guide door lock problems diagnostic guide experiencing problems un locking your doors.
If your early to mid 200 s audi or vw is gabbing problems with either side door electrical locks windows or anything electrical start by looking here.
If your locks are starting to act up or not working as they should be sure to replace them right away.
While it is a fair amount of work to replace the rear locks on the audi a4 it is still easier than being locked out of your car or having to climb over another passenger.
Lock actuator problem if you ve got an old school audi with manual locks the lock actuator mechanism inside the door panel can break due to an accident or simple wear and tear.