But you don't carry the hotel room with you. A car is a piece of equipment. You use that piece of equipment in public. I don't see why there should be an expect

But you don't carry the hotel room with you. A car is a piece of equipment. You use that piece of equipment in public. I don't see why there should be an expectation of privacy. Most security features are used once the car is flagged stolen. Nobody is going to listen to you sing karaoke in the car.