Look up a vehicle's VIN using a free VIN search service, such as the one provided by the National Insurance Crime Bureau, or paid services such as Carfax and VinCheckReport.com. A VIN search returns information such as whether a vehicle is stolen or has been involved in collisions.
A vehicle identification number is a unique 16-character string used for registration, insurance and sales purposes. The VIN program was instituted in part to deter vehicle theft and make the act of parting out stolen vehicles more difficult. The VIN number is on the dashboard or on the driver's side door frame of a car or truck.