A door module assembly for a motor vehicle door has a plate-like carrier holding a plurality of door hardware components in a pre-configured orientation, including one or more window regulator rails. The carrier seals the motor vehicle door and includes a flap that provides at least partial access to the window regulator rails. A first trim panel is pre-fixed to the carrier. A second trim panel articulates with respect to the first trim panel between an initial position generally parallel to the first trim panel and an installed position generally in-line with the first trim panel. With the carrier storing substantially all of the hardware required for the door and the trim panels covering substantially the entire surface area of the door, handling and assembly operations are minimized.