Ride height sensor

Depending on the optional equipment, a maximum of 4 ride height sensors are connected to the ICM control unit (2 front axle, 2 rear axle). On vehicles with electronic ride height control (EHC), the rear ride height sensors are 2-channel: 1 connection to the ICM control unit and 1 connection to the EHC control unit.

2-channel ride height sensors discontinued from 09/2010 (bus message from ICM). 

The ride height sensor is a non-contact sensor. The ride height sensor proportionally converts distances into an analogue voltage signal using an angle of rotation. The sensor can be rotated by 360°. The measuring range for each sensor is 70° (depending on installation position, see CHARACTERISTIC CURVE ). The signals are output as analogue electrical voltages.

Fig 1: Identifying Ride Height Sensor

Courtesy of BMW OF NORTH AMERICA, INC.