The rear door window regulator motor cannot be serviced separately. The rear door uses a cable drive regulator. The front door uses a one arm and guide regulator. The door window consists of a frameless piece of solid tempered safety glass. The guides on the glass are bonded to the window. They are not serviceable except for the replacement of the window. The service glass has the guides already installed. The door window and lower sash channel are removed from the door as a unit. Front side door window regulator or motor can be serviced separately.