Probably not without controlling one side of the communication. On the cell phone, you would need something that enforces mandatory access controls on what dat

Probably not without controlling one side of the communication. On the cell phone, you would need something that enforces mandatory access controls on what data can be sent over Bluetooth. Ideally a smart phone hacker could chime in. I've never owned one. Another potential option would be to root the car, likely voiding any warranty and potentially creating other liability implications.