VEHICLE REAR DOOR STRUCTURE

A rear panel assembly defines a rear opening and a motor attachment section and includes a door linkage assembly, a rear door and an electric motor. The door linkage assembly is connected to the rear panel assembly adjacent to one side of the rear opening. The door linkage assembly including a pivoting lever with a first end having a bore with an inner splined surface. The rear door attached to the door linkage assembly for movement between an open orientation and a closed orientation. The electric motor includes a mechanical attachment portion and a shaft having outer splines that fit within the bore and engage the inner splined surface. The mechanical attachment portion has a plurality of attachment structures that adjustably align the position and orientation of the shaft relative to the inner splined surface of the bore.