Detection of the sunlight intensity
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The sensors detect the intensity of the sunlight separately for the driver's side and the passenger's side. The sensor data is processed in the evaluation electronics and transmitted via the bus to the IHKA control unit. The IHKA control unit evaluates these sensor signals.