Or car infotainment systems with rental mode would be awesome. Like if every time you pair a phone, the car asks if you want it paired indefinitely, or for N da

Or car infotainment systems with rental mode would be awesome. Like if every time you pair a phone, the car asks if you want it paired indefinitely, or for N days. User sets N based on rental duration, and the car wipes the data after that. Granted, it's much better for the phone to not send contacts to a rental car at all, but either solution would be a significant improvement.