0. https://www.businessinsider.com/ford-exec-gps-2014-1 (comment from 2014)
Most other luxury cars will throw a million lights and warnings on the dash for a missing module, and the warnings must be coded out with specialty software.
BMWs tend to only throw a lot of lights when there is a specific module error, or the module acting up is vital to powertrain operation.
This also has the unintended consequence that nearly every light you end up seeing on a BMW will be a costly repair rather than just some nuisance error message.
This feature is a godsend when making a BMW based race-car and ripping out miles of wire.