Abstract: A door system for motor vehicles is designed to prevent jamming of the door in the event of a collision. The end of the door that retains the door lock is constructed so that an opening or slit is formed between it and the neighboring door pillar. This opening (in top view) runs diagonally to the plane of the door and ends near the outer surface of the door in an offset in the pillar and a flange in the outer surface of the door. A portion of the flange perpendicular to the outer door plate faces an outer region of the door pillar offset with a clearance. This clearance is always made wider than the diagonal opening in order to prevent jamming of the door during a longitudinal impact on the vehicle.