Motor position sensor: Construction
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2006 BMW 530i, 2006 BMW 525i, 2006 BMW 330xi, 2006 BMW 330i, and 2006 BMW 330Ci. However, it is still accessible from the selected car via links, so may be relevant.
The motor-position sensor consists of a magnetoresistive element and a permanent magnet. The permanent magnet is on the end face of the rotor shaft of the electric servomotor. The magnetoresistive element measures the magnetic field in the horizontal and vertical directions.