LWR Components

Control Electronics:

LWR Control Module - E38 & E39 Vehicles:

The LWR control module is located in the electronics carrier forward of the glovebox. The control module connects to a single, 26 pin, yellow harness connector. The control module has diagnostic capabilities and communicates with the DIS/MoDiC via the K bus - IKE gateway to the D bus.

Fig 1: Locating E38 Lwr Control Module Location

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Locating E39/E53 Lwr Control Module Location

Courtesy of BMW OF NORTH AMERICA, INC.

Level Sensors:

LWR monitors two hall effect level sensors to determine vehicle load angle. The sensors are mounted to a fixed point on the suspension carriers of the front and rear axles.

A lever is connected to the moving suspension member which changes the sensors output linear voltage signal as the suspension moves up and down.

NOTE: E39 sport wagon vehicles with EHC have a dual output sensor at the right rear location. This sensor shares the same housing as the EHC systems right rear level sensor.

Fig 3: Identifying LWR Level Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Headlight Adjustment Stepper Motors:

One stepper motor is located inside each headlight assembly.

The 4 wire stepper motors are controlled by the LWR control electronics to change the vertical headlight position.

Fig 4: View Of Headlight Adjustment Stepper Motors

Courtesy of BMW OF NORTH AMERICA, INC.