To install/ remove door lock, one has to first remove the door trim by loosening the fasteners gently with a flat screwdriver and remove the door trim. The third step will be to unplug the rod that is the push button release, then the securing clip and the push button. Then loosen the bolts which hold the door lock and remove the lock. To install, do the same thing in the opposite way of taking down, and reposition the door as is also described.