Digital Freedom

I'm guessing for anything detailed that it would be different for each manufacturer, and probably even different for various models or years (bc parts contractors for electronics might change, wiring could be different etc)

generically:

1. Never ever pair your phone's bluetooth with your car unless you are a techie and know how to isolate shit OR you don't have anything to track on the connected device (e.g. like maybe a 2nd old phone that you bought secondhand with cash and a fake name and you only use to play untraceable audiobooks/podcasts off)
2. Probably would need to look into your car's OnStar or whatever GPS system they bundle in these days, then research how to disable that. If you're lucky maybe you could disable it by finding the corresponding fuse and leaving that one disconnected... but somehow I think it would not be that easy.
3. Not sure what they mean by "biometric" data about you... If it's fingerprint, you might be able to defeat that with electrical/duct tape or a steering wheel cover but it really depends on if they force you to register to use the car or some shit. Really that kinda goes for other forms of biometric data like voice / retinal too... you're pretty much at the mercy of how much of an asshole they are about it. e.g. Don't buy shit that forces you to use it and then you can at least choose not to.

Even then... I doubt there's a way to kill any tracking data about your driving that gets stored on the car without knowing a good deal about electronics.

But really the best way is like others have said: get an older car (or find one that you can confirm doesn't do this shit and get that)

GrapheneOS for Tesla

I think several years ago there was some company that unlocked the car’s full potential for 1/2 of the price of the original update. I don’t remember their name nor what happened to them but they probably got sued