Electrochromic inside mirror, digital compass, garage door opener: Electrochromic
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 electrochromic inside mirror automatically dims the mirror glass if a light source from the rear is detected. The electrochromic inside mirror has two sensors that measure incident light from the front and the rear. When the light source from the rear is strength, a voltage signal is output. The strength of the voltage signal depends on the light difference between the front and rear. The greater the voltage signal, the more the mirror glass is dimmed. The electrochromic interior mirror controls the electrochromic outside mirrors via the JBE, FEM or BDC.