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Ride Height Sensor

There are two ride height sensors, one for each rear wheel. The ride height sensor is actuated by a coupling rod and sends a signal to the EHC control unit.

The sensor is a hall sensor which sends a DC Analog output voltage to the EHC module. The voltage range is approximately .5 to 4.5 volts. The voltage increases with increasing vehicle height and the nominal voltage at normal ride height is approximately 2.5 volts. The right side rear sensor is a double sensor, the additional sensor is an input to the headlight leveling system and has it's own power supply, ground and signal wires.

Fig 1: Identifying Ride Height Sensor
G03390625Courtesy of BMW OF NORTH AMERICA, INC.