Comment by retired

First thing I do on rental cars is pull out any devices plugged into the OBD port and follow the wiring for a bit to see if the port is duplicated. I'll plug it back in when they ask for it, that way I know it is not a bad actor at play.

Second thing is to do a factory reset on the infotainment and press "deny" on anything.

Third thing is to use a USB sanitizer so plugging in the USB-port doesn't sync any of my data with the car or initiate a pairing.

Final thing is to check tire pressure, unrelated to above but 9 out of 10 times the tire pressure on rental cars is incorrect. I have a little pen tester in my travel kit.