Vehicle identification number
Overview
 
A Vehicle Identification Number, commonly abbreviated to VIN, is a unique serial number
Serial number
A serial number is a unique number assigned for identification which varies from its successor or predecessor by a fixed discrete integer value...

 used by the automotive industry
Automotive industry
The automotive industry designs, develops, manufactures, markets, and sells motor vehicles, and is one of the world's most important economic sectors by revenue....

 to identify individual motor vehicle
Motor vehicle
A motor vehicle or road vehicle is a self-propelled wheeled vehicle that does not operate on rails, such as trains or trolleys. The vehicle propulsion is provided by an engine or motor, usually by an internal combustion engine, or an electric motor, or some combination of the two, such as hybrid...

s. VINs were first used in 1954. From 1954 to 1981, there was no accepted standard for these numbers, so different manufacturers used different formats.

In 1981, the National Highway Traffic Safety Administration
National Highway Traffic Safety Administration
The National Highway Traffic Safety Administration is an agency of the Executive Branch of the U.S. government, part of the Department of Transportation...

 of the United States standardized the format. It required all over-the-road-vehicles sold to contain a 17-character VIN, which does not include the letters I (i), O (o), or Q (q) (to avoid confusion with numerals 1 and 0).

There are vehicle history services in several countries that can help potential car owners use VINs to find lemons
Lemon (automobile)
A lemon is a car, often new, that is found to be defective only after it has been bought. Any vehicle with numerous, severe issues can be termed a "lemon", and, by extension, any product with flaws too great or severe to serve its purpose can be described as a "lemon".-Origin:The use of the word...

 and branded vehicles
Vehicle title branding
Vehicle title branding is the use of a permanent designation on a vehicle's title, registration or permit documents to indicate that a vehicle has been written off due to collision, fire or flood damage or has been sold for scrap....

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