General notes
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.
All master control units of the specification LIN V2.0 and higher are backwards compatible to the components of the previous specification. But all slaves V2.0 also require a master control unit V2.0 and higher.