Actuator for a vehicle braking system

The invention relates to an actuator device (1) for a vehicle, in particular for a brake system of a motor vehicle, having at least an electronically commutated electric motor (7) in a rotationally fixed one on a rotatably mounted shaft (5) disposed rotor (9), and with at least a rotation angle sensor (13) for detecting a rotational position of the rotor (9), said shaft (5) with at least one through the electric motor (7) to be driven load (3) is connected. It is contemplated that the rotational angle sensor (13) associated with a consumer (3) end (16) associated with the shaft (5).