Which Country Produces Most Cars in the World: In 2012, Organization Internationale Des Constructeurs automobiles (OICA) made a very accurate estimation in which a list of countries was prepared by their number of vehicles production. Automobile cars, small commercial vehicles, minibuses, trucks and buses are included in that research. According to that research, China was the Leading vehicle Manufacturer if compared to all the other countries. In 2006, It was the world’s third biggest manufacturer of Vehichles in the world’s market, but in only few years it got progress and become the top and largest producer in the whole world. Now it in 4 cars produced in the world china has 1 of these 4. In 2011 its annual production was 18,418,876.