Modern cars are computers on wheels - they have more sensors than you can count and are constantly phoning home with telemetry data like your location, speed, fuel levels, sudden accelerations/decelerations, video footage, driver attention data from eye monitoring systems, and hundreds of other data points. Cars have inward- and outward-facing cameras. They have microphones. They have always-on modems. It’s all enabled by default with difficult or meaningless opt-outs, and your data is monetized through brokers like LexisNexis or Verisk.
Remember, if your goal is to avoid surveillance then you shouldn’t use android auto or apple CarPlay either.
https://gizmodo.com/doj-is-asking-apple-and-google-to-hand-over-data-on-100000-users-of-a-car-app-2000758890
This has nothing to do with CarPlay or Android Auto. This is about an OBD port and Bluetooth app to connect to the car computer.
Privacy experts suggest not using a cellular phone at all.