Have Subaru Questions? Ask a Subaru Mechanic and Get Answers ASAP
You will most likely need to replace the door latch and lock actuator assembly.
Here is the procedure for removal.
Please reply to this if you need more help. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. If I am not giving you 5 star service, please let me know what I missed.
ASE Master Technician
Probably going to have to take the door panel off while the door is closed. You may need to unbolt the drivers seat and move it into the back seat. If you can get the window down all the way, there are lock out tools that can be used to open the door.