Free VIN Decoder

The very first character places the vehicle on a map. Numbers 1, 4, and 5 mean the US; 2 is Canada; 3 is Mexico. Letters encode the rest of the world — J for Japan, K for South Korea, L for China, W for Germany, S for the UK.

A 'J' Toyota or a '5' BMW simply means the car was assembled in those countries — not that it's a different brand.

Characters 2 and 3 narrow the manufacturer down to a specific brand or division. '1G1' = Chevrolet passenger cars; '1GC' = Chevrolet trucks; '1FA' = Ford passenger cars. There are over 48,000 WMI codes assigned globally by the Society of Automotive Engineers (SAE).

Corporate mergers can make WMIs confusing — Stellantis-owned Jeep and Dodge still use US codes even though the parent company is Dutch.

These five characters define the type of vehicle. Manufacturers use their own internal coding systems, but position 8 almost universally identifies the engine type. A 'U' in position 8 of a 2007 Corvette means a 6.0L V8; an 'E' means the 7.0L Z06 engine.

Position 8 is the most useful digit in the VDS — it's the quickest way to confirm which engine variant you have.

This single character is calculated from all other 16 digits using a weighted mathematical formula defined by NHTSA. It can be any digit 0–9, or the letter X. Its sole purpose is to validate the VIN — if someone tampers with any other digit, the check digit will no longer match.

VIN cloning fraud is often caught here. Thieves alter digits but forget to recalculate position 9, instantly flagging the fake.

A single letter or number encodes the model year on a 30-year repeating cycle. 'A'=1980/2010, 'B'=1981/2011… 'Y'=2000/2030, then '1'–'9' for 2001–2009/2031–2039. Letters I, O, Q, U, Z and the number 0 are never used to avoid confusion.

Model year ≠ build date. A car assembled in September 2024 is often a 2025 model year (code 'S'). Use the door jamb sticker for the actual build date.

Every manufacturer maintains its own plant code list, so there's no universal decoder. 'K' in a Toyota VIN means the Takaoka plant in Toyota City, Japan. 'B' in a Ford VIN means the Oakville Assembly plant in Ontario. The NHTSA vPIC database maps most modern plant codes.

Plant codes can affect parts availability, warranty coverage, and even paint formulas — Bowling Green (Corvette) vs. other GM facilities, for example.

The final six characters form the vehicle's unique serial number within its model year and plant. In North America and China, this is purely sequential — the order in which vehicles rolled off the line. A low number (e.g. 000001) indicates an early production unit.

Small-volume manufacturers (under 1,000 vehicles/year) use a '9' in position 3 and spread their identifier across positions 12–14 as well.