Every vehicle has a unique 17-character VIN that encodes its entire identity. Here's exactly what each position means and how to decode it yourself.
What Is a VIN Number?
A VIN (Vehicle Identification Number) is a standardized 17-character code assigned to every motor vehicle at the time of manufacture. No two vehicles in operation share the same VIN. The format has been standardized by ISO 3779 since 1981, which is why all modern vehicles use the same 17-digit structure. You'll find the VIN on the driver's side dashboard (visible through the windshield), the driver's side door jamb sticker, the engine block, and the vehicle's title and registration.
Characters 1–3: World Manufacturer Identifier (WMI)
The first three characters identify who made the vehicle. Character 1 is the country of manufacture: 1, 4, 5 = United States; 2 = Canada; 3 = Mexico; J = Japan; K = South Korea; W = Germany; S = United Kingdom. Character 2 identifies the manufacturer (e.g., T = Toyota, M = General Motors). Character 3 identifies the vehicle type or manufacturing division. Example: '1HG' = Honda USA passenger car. '1FT' = Ford USA truck.
Characters 4–8: Vehicle Descriptor Section (VDS)
These five characters describe the specific vehicle: body style, engine type, model, and restraint systems. This section varies by manufacturer — Ford and Toyota encode this information differently. This is the section most useful for understanding exactly what trim and engine you're looking at. When you run a cheap VIN check, this data is decoded automatically and cross-referenced with the vehicle's reported history.
Character 9: Check Digit
The 9th character is a mathematical check digit calculated from all other VIN characters using a weighted formula. It exists to detect invalid or fraudulent VINs. If someone tries to alter a VIN number, the check digit will no longer validate. This is one reason VIN fraud is difficult to get away with when buyers run a proper VIN lookup.
Character 10: Model Year
Character 10 encodes the model year. The alphabet (excluding I, O, Q, U, Z) and numbers 1–9 are cycled through. For example: A=1980, B=1981 ... Y=2000, 1=2001, 2=2002 ... 9=2009, A=2010, B=2011 ... Y=2030. This means a vehicle with '5' in position 10 could be a 1995 or 2025 model — context from other characters clarifies which.
Character 11: Assembly Plant
This character identifies which manufacturing plant built the vehicle. Each manufacturer assigns their own plant codes. Knowing the plant can matter for certain models known to have quality issues from specific facilities.
Characters 12–17: Production Sequence Number
The final six characters are the unique serial number that distinguishes this vehicle from every other vehicle of the same make, model, and year built at the same plant. This is what makes each VIN globally unique. When you run a cheap CARFAX alternative report, this sequence ties all reported history events to this specific vehicle.
How to Run a VIN Check
Now that you understand what your VIN means, run a full vehicle history report to see what's been reported against it. A cheap VIN check at $4.49 gives you accident history, title status, odometer records, and recall data — everything you need before buying a used car. Enter your 17-digit VIN in the search box at the top of this page.
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