Okay, so you have an accident, who's to blame? The programmer or the driver? Perhaps a hacker steered your car to the right just a little for you to hit a tree, and all the equipment burst into flames, will there be a network trace to recover? So the code review will be one which determines the balance between life and death for the driver for accidental bugs in steering or breaking systems, but are you willing to trust a car company who could possibly get away with murdering you (steer your car into a tree, delete the server side records, on car devices already destroyed)? Creepy thoughts, but an actual possibility. So now we're talking airplane technology, every car will need an indestructible black box recording unit, which can be authenticated without any room for failure.
The point here is if you want a transportation mechanism that's aware of you and itself, get a horse.