In a recent survey, research found that an estimated 77% of cars were in need of maintenance or repairs. Engine and transmission problems are two of the most expensive auto repairs in the United States. There are an estimated 87,032 auto repair businesses in the United States. According to the Bureau of Labor Statistics, there are an estimated 701,100 automobile mechanics in the U.S. The automobile repair industry generates an estimated $58 billion in revenue throughout the United States.