A sensor arrangement for measuring a rotor position of an electric motor, in particular of a motor vehicle control device, wherein the sensor arrangement is constructed as a sensor arrangement operating without contact, which includes at least one permanent magnet and at least one magnetic field sensor, wherein the permanent magnet has at least one depression in at least one top surface facing the magnetic field sensor. A magnetization device for magnetizing a permanent magnet of the sensor arrangement is also disclosed. The use of the sensor arrangement in a motor vehicle control device of a braking system of a motor vehicle is also disclosed.