Abstract: A door for motor vehicles has a door outer sheet, a door inner sheet, a closing sheet for the window frame and reinforcing sheets for example for lateral collision protection, for fastening the door hinges and for receiving the door units. The inventive door has an outer module (A) and an inner module (I). The outer module (A) includes the door outer sheet (1) and a connecting sheet (6) fastened on the inside thereof, the connecting sheet (6) being provided with integrated or retrofittable reinforcing elements (4 and 10) and carries the door hinges that can be detachably linked with the body. The inner module (I) includes a door inner sheet (2) and at least one closing sheet (3) linked therewith. The door inner sheet (2) and the closing sheet (3) enclose the window frame. The inner module (I) is provided with receiving possibilities for the door units such as for example window pane, window actuator, lateral airbag.