I recently watched a few videos about people taking the modems/WiFi boxes out of their new cars to stop the constant data collection.
On one of the videos there’s a warning that if you attach your phone to your car then the car will almost certainly start to contact through the BT to ‘phone home’ again to send data that way.

I’ve got no idea if any of it is all true, but with today’s data collection companies mining everything they can then I can easily believe it.