It's perfectly legal for cars to harvest your texts, call logs

[LauraInLA]

9. The problem is

That the car is storing your call and text data — a VPN doesn’t prevent that. If the authorities take a look at your car’s data, it will still include texts and call logs.

The only way around it is to have an old car or not hook up your phone in your car via Bluetooth, USB, etc.

The caveat is that cars are required, the first time you connect your device, to ask your permission to store contacts, data, etc. You can refuse, which will then limit the functionality.