According to the NHTSA, there are approximately 452,000 cases of odometer fraud per year in the United States. (samarins.com)
NHTSA investigates safety defects in motor vehicles, sets and enforces fuel economy standards, helps states and local communities reduce the threat of drunk drivers, promotes the use of safety belts, child safety seats and air bags, investigates odometer fraud, establishes and enforces vehicle anti-theft regulations and provides consumer information on motor vehicle safety topics. (transportation.gov)
Congress tried to reduce odometer fraud in 1986 by passing the Truth in Mileage Act, which requires owners to disclose mileage on the title when a vehicle is sold. (articles.orlandosentinel.com)