With the assembly case finally open, we can see the motor, gear and levers which drive the door lock actuator.

Take care not to disrupt the various levers , spring, etc. or else study the photo to ensure to get the parts back to their proper positions.

As it turns out, the motor is trivial to replace and all the effort has been spent simply getting access TO the motor!

Simply remove the motor by using a small screwdriver or pry tool to lift up on the rear of the housing.

With the motor removed, slide the gear off of the shaft and slide it back onto on the NEW motor. The shaft and shaft gear have a common flat side that allows the gear to properly fit onto the shaft.

Place the new motor into the actuator case where the old one was just removed.