Typically the hacks amount to enabling a feature in the car that you would otherwise have to pay for. For example new BMWs come with seat-heaters in the car, bu

Typically the hacks amount to enabling a feature in the car that you would otherwise have to pay for. For example new BMWs come with seat-heaters in the car, but not available to be used unless an additional fee is paid to unlock them. A "hack" would be using the seat-heaters in the car you paid for without paying. For things like custom driving software, usually people test that on closed race tracks, etc.