Mirrors are impossible on vehicles for a couple of complex reasons, but just know that will never happen. However, I have talked to Fredy in the past about making it so some button such as shift, would force your camera to look backward between the front seats so it'd be like looking over your shoulder, to see behind you. No real word on if we plan on doing this or not at some point, but I am totally for having first person cars only, since at least for me personally I know I drive far more carefully in first person than if I'm in third. So I would think there might be better driving overall, may also need like Ctrl button to show a top down view of your car, so when you're parking you can clearly tell if you're in the parking spot properly or not.