Wheel-Speed Sensors
WARNING: This page does not describe the selected car, but rather 46 other vehicles, including the 2008 BMW M5, 2008 BMW 650i, 2007 BMW Z4, 2007 BMW M6, and 2007 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
Each of the wheel speed sensors measures the circumferential speed of an individual wheel. The DSC control unit (DSC: Dynamic Stability Control) uses these input signals to calculate the car's road speed.
The main-beam headlights are switched on when the car's road speed is above 50 km/h.
The main-beam headlights are switched off when the car's road speed is below 38 km/h.
For more information, please refer to SI Technology (SBT) 34 01 05 126.