I understand that airliners have separation between the computer systems used for entertainment and life-critical systems. That permits a less costly, lower reliability/testing standard to be used on the entertainment systems.
Unfortunately, current automobiles don't seem to have that separation:
In a statement released today, the Sweden-based car manufacturer says EX30 vehicles can accidentally throw up a "test screen" on the center monitor, obscuring the normal driving statistics shown there including the speedometer and infotainment features. The exact cause of the bug has yet to be disclosed.