Although there are no standard locations for the vehicle identification number, it is most commonly found in the corner of the dashboard in front of the steering wheel and on the post of the driver's side door. Other locations include on the engine block, car frame and rear wheel well.
Since 1981, the National Highway Traffic Safety Administration has required that every vehicle be assigned a unique vehicle identification number when it is manufactured. These numbers consist of 17 alphanumeric characters that encode information about the vehicle's manufacturer, model year and the location of its assembly. Throughout the vehicle's existence the number is used on a variety of forms, such as registrations, titles, insurance cards, accident reports and repair records.