Car jacking is sooo 1990’s.
You are an idiot if you do it today.
First of all, a lot of cars have gps. That means if you steal a car, the owner knows exactly where you are. Second, all the car electronics talk to each other and use passwords. That is if you steal a radio and put it in an identical car, it will not work because the car knows it is the wrong radio using the wrong password.
Third, a lot of cars can be disabled by remote control.
Fourth, hundreds of thousands of people are now packing a pistol in their car, in their purse, or on their person.