The electric door lock actuator is part of the door lock unit and is not available separately from BMW. Ensure the door window is closed before proceeding. Begin by removing the
Door Handle and then the door panel. Unclip the electrical connection from the door lock and the wiring harness clip, followed by unclipping the lock rod from the door lock. Partially remove the vapor barrier from inside the door and feed out the wires from it, taking care to avoid damage, as a damaged vapor barrier should be replaced to prevent water leaks. While working inside the door cavity, unclip the bowden cable from the door lock assembly. When reinstalling, ensure that the lock cylinder drive is properly seated, and take care not to damage the lock seal during removal. Remove the screws and feed out the door lock from inside the door cavity, with installation being the reverse of removal.