For the sensor your part number is probably 4g8927753b.
Audi door handle sensor not working.
If it is okay check the cable that runs from the handle to the actuator.
Each door has a sensor in the handle.
Unbolt the door lock assembly from the door and then pull the assembly out.
Are you having problems with your door locks either from the key fob or the inside handles.
Check the actuator and replace if found to be faulty.
They are notorious for going bad.
Takes a little patience to remove the door handle as well as remove the sensor part from the handle.
It will tell you exactly why the keyless entry system isn t working.
If there is a kink in it it will prevent the latch from working.
You just need to find which door handle sensor has gone bad and replace that sensor.
There is a plastic clip attached to this rod.
Push down the clip to loosen the rod then pull the rod up and out of the door.
When one sensor fails the entire system shuts off.
This article will walk you through the potential causes of the problem and how to fix them.
On this occassion all door handles and boot sensors work when unlocking the car and all locking sensors work except on on drivers door.
Why is the outside door handle on a 2008 audi tt intermittently not working.