In brief
ZF's Wheel Angle Sensor is installed in a joint near the wheel and uses the Hall principle. It supplies angle data for control systems.
Useful to know
ZF's Wheel Angle Sensor is installed in a joint near the wheel and uses the Hall principle. It supplies angle data for control systems. [1]
Measurement location matters. Wheel angle and steering-wheel angle are not identical quantities even though steering geometry connects them. During diagnostics, identify which signal is being examined.
Sources
For further detail and to check the information: