The average salesman will act like they know but they don't. About the only choice for a private vehicle is going to be an older vehicle. New ones are getting less private and larger and more expensive. Go with an older but we'll cared for Honda or Toyota.

A lot of vehicles prior to 2005 will not have a black box that records everything (and for which you will not have the encryption key for), nor will it phone home in any capacity.

Pretty much 100% of vehicles prior to 1995 will definitely lack these features.

If you want a vehicle that you control 100%, get a vintage vehicle.

Privacy and cars are mutually exclusive. If you want privacy use public transport and pay in cash. With cars you have licence plate scanner, cameras and tollbooths everywhere (no to mention that most people drive with their phones on them). "They" will know where were you driving no matter what car you use. The question really is what data are you trying to hide and from who? The obvious thing to do is not to give your data to advertisers. Selling you shit is the whole point of most of the data collection. Just get extra phone and use some fake google account for android auto and you should be fine here. As for car companies all they will gather is some generic data about your driving habits but guess what? Everyone knows this already because driving is not private (again, if you want to hide this use public transport). So yeah, it would be nice for car companies to be more transparent about the data they gather and how they use it but it's really not a big issue. If you're paranoid about it then don't drive. If you're driving the data your car is leaking though analytics is not your biggest problem.