Privacy

None. Every single modern vehicle built by every major manufacturer has copius tracking and phone-home features, even the most basic of basic stripped down fleet vehicles with no infotainment still do it.

If you're electronically inclined, one could probably find a modern vehicle that is sufficiently modular and remove/disable the phone-home systems. (GM's OnStar I believe is still fairly defeatable these days, as it is or was a separate computer module). But unless you have deep, innate knowledge of RF and can go so far as to band scan your vehicle after you remove or destroy the relevant wireless tech, there is no guarantee you will get 100% secure. And many of those systems are now (intentionally) deeply integrated with the rest of the body control devices and alarm systems, defeating them may throw errors that will cripple your car into engine limp mode or endless nuisance alerts.

This also doesn't account for the fact that modern vehicles do a lot of saved-trip logging that would still be available locally, if someone were so inclined to gain physical access to and/or confiscate your vehicle to download said logs.

Buy used and keep fixing them, or stop driving, those are your options. Welcome to late stage capitalism, sucks to suck, will that be cash or card?