[zzz95]

This is false, even more so for most Tesla models. Cars have a distributed E/E architecture where embedded software runs on several computers (called ECUs that range from anywhere between 10 and 100+). Most newer Tesla models are ahead of the curve and have a more centralized (zonal) E/E architecture with very few number of ECUs.

In summary, the infotainment system and the drivetrain definitely speak to each other and unless a secure architecture comes along, I would not discount the possibility of unintended interactions due to bugs. In fact, most famous car hacks start from the infotainment system and make their way into the drivetrain.