I have the same problem with the rear door door lock actuators on Legacy 2006, the rear left door is not working at all, and the rear right door actuator sometimes lcoks the door.
I have noticed that the rear right door actuator sometimes move only half of the way, so pressing the central locking system twice does the locking.
It appear that the actuators are working on both doors cause i'm hearing the sound of them moving and sometimes it's sound like they are missing couple of notch's on the weel.
A friend of mine told me to check for the resistance on the cable pushing the locker, it might be the issue.
Last edited by amirz; 06-02-2010 at 06:39 AM..