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What is a VIN?

Most vehicle owners have had to reference their Vehicle Identification Number (VIN) at some point. Whether for the purpose of reporting insurance, registering a new car, requesting a vehicle history report or even for something as simple as registering for a parking pass; auto owners will inevitably encounter the long, confusing string of numbers and letters that comprise the VIN code.

A VIN number is a set of alphanumeric characters that identifies an individual vehicle through a system set forth by the Department of Transportation and the International Organization for Standardization.

Simply put, a car’s VIN number is like a human’s DNA – it follows a specific code, and is entirely unique to each vehicle, standardizing automobile identification on a global level. The combination of seventeen characters identify the make, model and year of the vehicle, as well as details such as engine type, vehicle restraint system and vehicle weight. VIN numbers are used for all road-going vehicles including trucks, trailers, busses and motorcycles.

VIN numbers can be found on the driver’s side dash as well as on the engine block, although it is not uncommon to find them in other places such as the passenger door frame, vehicle firewall or radiator support bracket.

How does it work?

Each VIN consists of seventeen characters, with each character in the VIN representing a different aspect of the vehicle. For example, the first character in the VIN number represents the vehicle’s country of origin; the second represents the vehicle manufacturer, and so on.

While it may seem possible for two vehicles of identical make, model, body style, engine and trim to receive identical VIN numbers, identical vehicles rely on the manufacturer’s serial number – the sequential order in which they were produced – to differentiate them.

Due to each car’s unique VIN identification, anyone can track the history of any individual vehicle on the road. Accidents, thefts, recalls and vehicle code violations are all linked to VIN numbers, and thus can be pulled up via a vehicle history report. Vehicle history reports have become an important part of car shopping within the used car market, and would not be possible without the help of the VIN system.

History of the VIN number

Due to the number of vehicles on the road today, the VIN number is more or less a necessity. However, in the first half of the twentieth century, vehicle tracking was not as important; so VIN numbers were only used for manufacturer records. Early VIN numbers typically identified simple characteristics such as car make, model and year, and were not mandatory.

As automobile production increased drastically in the 1950’s, it became clear that a new system was needed. American automotive manufacturers started printing identification numbers on their vehicles in order to accurately describe and keep track of each model, body style, engine and assembly location. Over time, identifying VIN numbers became complex because each manufacturer had its own identification codes, meaning VIN numbers were of different configurations and lengths.

The United States Department of Transportation, along with the International Organization for Standardization (ISO), issued a standardized system for VIN numbers in 1980. As a result of the new system, each vehicle would be identified by a unique seventeen-digit alphanumeric identifier, which could be used to track the vehicle throughout its lifetime.

According to Roger Frost, Communications Manager at the ISO, “[The VIN Number] was developed with participation of automobile industry and police authorities (including INTERPOL) so as to combat against thefts, trafficking and illegal dereliction concerning vehicles.”

Today, VIN numbers are the key identifier used to track vehicle history reports, which have become a popular tool for drivers shopping for used cars.

VIN decoding

Decoding a VIN number might seem like a daunting task given the complexity of the code and the staggering amount of vehicles that have been produced since its inception in 1980, but breaking a VIN number down into its basic parts makes the task much easier. Each VIN number is comprised of the following four sections: a world manufacturer’s identification (characters 1-3), a vehicle description section (characters 4-8), a VIN accuracy check digit (character 9), and an individual vehicle identification section (characters 10-17).

Breaking a VIN number down into its four major sections makes decoding it a much easier task. While you might not understand every character in the code, the next time you reference your car’s VIN you will have a good idea of what it all means.



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