VIN Number Breakdown

VIN Structure Overview

A standard VIN consists of 17 alphanumeric characters divided into three sections: the World Manufacturer Identifier (WMI), the Vehicle Descriptor Section (VDS), and the Vehicle Identifier Section (VIS). The letters I, O, and Q are never used to avoid confusion with the numbers 1, 0, and 9.

Position 1: Country of Manufacture

The first character identifies the country where the vehicle was manufactured, not where the brand is headquartered. For example, a Toyota built in Kentucky will start with a different character than one built in Japan.

Position 2: Manufacturer

The second character identifies the vehicle manufacturer or the company division. Combined with position 1, it narrows down the exact producer.

Position 3: Vehicle Type or Manufacturing Division

The third character, combined with the first two, completes the World Manufacturer Identifier (WMI). It typically indicates the vehicle type (passenger car, truck, SUV) or the specific manufacturing division within a larger corporation. For example, in a General Motors VIN, position 3 might distinguish between Chevrolet, GMC, Buick, and Cadillac.

Positions 4-8: Vehicle Descriptor Section

These five characters describe the specific attributes of the vehicle. The meaning of each position in this section varies by manufacturer, but collectively they encode the following information:

• Position 4: Typically the body type, platform, or model line (sedan, coupe, SUV, etc.)
• Position 5: Often the model series or restraint type (airbag configuration, seatbelt type)
• Position 6: Usually the body style (2-door, 4-door, wagon, convertible) or the model designation
• Position 7: Commonly the engine type (4-cylinder, V6, V8, electric motor, turbo variant)
• Position 8: Frequently the transmission type (manual, automatic, CVT) or additional model info

Position 9: Check Digit

Position 9 is a calculated verification digit that validates the entire VIN. Each character in the VIN is assigned a numerical value and a positional weight. These values are multiplied, summed, and divided by 11. The remainder becomes the check digit. If the remainder is 10, the letter X is used. This mathematical verification helps detect VIN fraud, data entry errors, and tampering.

Position 10: Model Year

The tenth character encodes the vehicle's model year. Note that the model year may differ from the calendar year the vehicle was actually built, as manufacturers often begin producing next year's models in the current calendar year.

Position 11: Assembly Plant

The eleventh character identifies the specific manufacturing plant where the vehicle was assembled. Each manufacturer assigns its own plant codes, so the same letter may represent different plants for different manufacturers. For instance, a Ford VIN with plant code "A" indicates the Atlanta assembly plant, while a Toyota VIN with the same code might indicate a completely different facility.

Positions 12-17: Production Sequence Number

The final six characters form the vehicle's unique serial number within its model, year, and assembly plant. This is a sequential number assigned as each vehicle comes off the production line. These digits make each VIN truly unique and are essential for identifying a specific individual vehicle among thousands of identical models.

Decode Your VIN Now

Now that you understand what each VIN position means, use our free VIN Decoder to translate your vehicle's VIN into readable specifications. The decoder pulls data from the official NHTSA VPIC database to give you accurate, comprehensive vehicle information instantly.

For a deep dive into the full technical process, including the ISO standards, NHTSA databases, and check digit algorithm that power every VIN decode, read our complete guide: How VIN Decoding Works.