Auto industry is the most important industry in America. Its share in US GDP is approximately three percent. There is a slowdown in the industry over the past few years owing to the economic and geopolitical conditions. Sales of vehicles in USA are on the decline as inventories with most of the car dealers have increased by forty percent says Alex Korchmar. Nevertheless, auto industry is one of the leading businesses. The lifestyle of people changes with the changing scenario of the economy. Ford Motor is the richest car company in the world.