Abstract: A drive device for motor-actuated displacement of a movable component part of a motor vehicle includes: a housing tube in which is arranged a rotary electric motor having a rotor with a radially magnetized permanent magnet; a supporting ring arranged in the housing tube so as to be axially supported at the electric motor; and a sensor arrangement arranged at a determined distance from the electric motor, the sensor arrangement being configured to contactlessly detect rotational movement of the rotor of the electric motor. The sensor arrangement has at least one Hall sensor arranged on a carrier board, the carrier board being supported by the supporting ring so as to be axially supported at the electric motor. The supporting ring is connected to the electric motor by positive engagement and/or frictional engagement.