They are looking to buy new, and need Android Auto and CarPlay
I was active on an automotive forum around the time when that sort of thing started to be seen as a "need" by car salesmen and some of their more enthusiastic customers. The big new thing was "infotainment" and it seemed like the whole industry was insisting we'd all soon see how essential this stuff was. I was disdainful of the idea then, and have only become more so. Cars should have an AM/FM radio receiver, and aside from lights and a horn that's all they need for communications.
That's not the answer you're looking for, but it seems reasonably on-topic here. If you must get a new car, the easiest route to having it not spy on you as much as it can all the time is to make sure it doesn't have a SIM card (or remove the one it does have) and never connect your phone to it in any way except perhaps via a 3.5mm audio jack.