NHTSA is an acronym for National Highway Traffic Safety Administration. The agency is part of the U.S. Department of Transportation
It 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. NHTSA also conducts research on driver behavior and traffic safety, to develop the most efficient and effective means of bringing about safety improvements.
The nationwide toll-free number is 1-888-327-4236. For the hearing impaired the TTY number is 800-424-9153.