LEDs for lane change warning
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.
With the equipment with lane change warning, LEDs are integrated in the exterior mirror. The LEDs for the lane change warning are only available in connection with a High equipped exterior mirror. The LEDs are controlled and monitored by the ICM control unit. The ICM control unit is the master control for the lane change warning function. The front electronic module (FEM) does not evaluate the information from the lane change warning and the LEDs. Instead, it forwards the information via CAN bus to the ICM control unit.