AC Propulsion's tZero. Pascal Le Segretain/Getty Images; J. Strauss/FilmMagic Back in 2003, Elon Musk test drove a tiny, yellow electric car called a tZero. While Musk didn't know it then, the tZero would directly lead to him becoming CEO of Tesla. Musk was impressed with the car and lobbied unsuccessfully to get the leaders of the company that made the tZero, AC Propulsion, to commercialize it. They declined, but introduced him to a group who was looking to collaborate on an electric car startup: Tesla Motors' Martin Eberhard, Marc Tarpenning, and Ian Wright. The tZero led the way for Tesla's first car, the Roadster, which hit the market in 2008.