But the more the Tesla guys researched the industry, the more they realized that the big automakers don’t even really build their cars anymore. The days of Henry Ford having raw materials delivered to one end of his Michigan factory and then sending cars out the other end had long passed. “BMW didn’t make its windshields or upholstery or rearview mirrors,” Tarpenning said. “The only thing the big car companies had kept was internal combustion research, sales and marketing, and the final assembly.
