text: Next, cars can malfunction adn there have been recalls in the past because of things that have gone wrong. For example brakes not working causing a death toll. What car brand wants someone to look at their cars and then see a death toll due to the fact that the car companies brakes didn't do their job and a person couldn't stop? Driverless cars have many sensors. AS started from the text, "For starters, they needed a whole lot of sensors." Sensors and almost anything else can malfunction for no reason at all. Because of how many sensors would be in a completely driverless car there is no way to insure that every sensor will work properly and make sure no mistakes will be made.