VINs follow a standardized 17-character format that changed in 1981, and the 10th character always tells you the model year
A Vehicle Identification Number (VIN) is a 17-character code assigned to every car made since 1981. The 10th character — counting from the left — is the model year code. It cycles through the letters A through Y (skipping I, O, Q, and Z to avoid confusion with numbers), repeating every 30 years. So A represents 2010 and 2040, B represents 2011 and 2041, and so on. If you know the 10th character, you can narrow down the year to two possibilities separated by 30 years.
The other 16 characters encode the manufacturer, the type of vehicle, safety features, engine, transmission, and a check digit that validates the entire number. The first three characters identify the manufacturer and country of origin. Characters 4 through 8 describe the vehicle itself — its body style, engine type, and other specifications. Characters 11 through 17 are the serial number unique to that individual car. Understanding this structure helps you verify that a VIN actually matches the year and model a seller claims.
Key Takeaways
- The 10th character of a VIN is always the model year code, using letters A through Y on a 30-year cycle.
- Characters 1 through 3 identify the manufacturer and country; characters 4 through 8 describe the vehicle type and engine.
- The 9th character is a check digit calculated from all other characters and can reveal if a VIN has been altered or is fake.
- A VIN from 1981 to 2009 uses a different format, so you cannot use the 10th-character method on older vehicles.
The model year code repeats every 30 years
Manufacturers use a 30-year cycle for the 10th character because it is long enough that most vehicles from the first cycle are no longer in common use. The cycle began in 1980 with the letter A for 1980 model year vehicles, though the modern 17-character VIN format itself started in 1981. The letters I, O, Q, and Z are omitted, leaving 23 usable letters. After Y (2000 and 2030), the cycle restarts at A.
This means a VIN with a 10th character of "L" could represent either 2020 or 1990. To determine which, you need additional context: the vehicle's condition, the odometer reading, or other details from the title or registration. A 1990 car would be 34 years old now, while a 2020 car would be 4 years old. If the seller claims a recent model but the rest of the VIN or the car's appearance suggests otherwise, the VIN may not match the stated year.
How to find and read the model year character
The VIN appears in multiple places on a vehicle. The most common location is on a metal plate on the driver's side of the dashboard, visible through the windshield from outside. It also appears on the driver's side door jamb, on the title and registration documents, and on insurance paperwork. Count 10 characters from the left — the 10th character is the model year code.
For example, if the VIN is 1HGCV41JXMN109186, the 10th character is X, which represents 2009 or 1979. Given that this is a modern VIN format, it is 2009. If the VIN is WBADT43452G296706, the 10th character is 5, which represents 2005 or 1975. Again, the modern format indicates 2005. Once you have the 10th character, cross-reference it with the year code chart to narrow the year to two possibilities.
Model year codes from 1981 to 2050
| Character | First Cycle | Second Cycle | Third Cycle |
|---|---|---|---|
| A | 1980 | 2010 | 2040 |
| B | 1981 | 2011 | 2041 |
| C | 1982 | 2012 | 2042 |
| D | 1983 | 2013 | 2043 |
| E | 1984 | 2014 | 2044 |
| F | 1985 | 2015 | 2045 |
| G | 1986 | 2016 | 2046 |
| H | 1987 | 2017 | 2047 |
| J | 1988 | 2018 | 2048 |
| K | 1989 | 2019 | 2049 |
| L | 1990 | 2020 | 2050 |
| M | 1991 | 2021 | |
| N | 1992 | 2022 | |
| P | 1993 | 2023 | |
| R | 1994 | 2024 | |
| S | 1995 | 2025 | |
| T | 1996 | 2026 | |
| V | 1997 | 2027 | |
| W | 1998 | 2028 | |
| X | 1999 | 2029 | |
| Y | 2000 | 2030 |
What the other characters in a VIN tell you
The first character indicates the country where the vehicle was built. 1, 4, or 5 means the United States; 2 means Canada; 3 means Mexico; J means Japan; K means South Korea; W means Germany; and so on. The second and third characters identify the manufacturer — for example, HG in a Honda VIN, or WB in a BMW VIN. Together, the first three characters form the World Manufacturer Identifier (WMI).
Characters 4 through 8 describe the vehicle itself. The 4th character often indicates the body style (sedan, coupe, SUV, truck). The 5th character typically identifies the engine type and size. The 6th through 8th characters vary by manufacturer but often encode transmission type, safety features, or other specifications. The 9th character is a check digit — a number calculated from all the other characters using a specific formula. If someone alters a VIN, the check digit will no longer match, which is why it is useful for detecting fraud.
Characters 11 through 17 are the serial number, unique to each individual vehicle rolling off the assembly line. Two cars with identical VINs except for the serial number were built on different days or at different plants. This section is where you find the most variation among vehicles of the same make, model, and year.
VINs before 1981 do not follow the same structure
Vehicles manufactured before 1981 have VINs that vary in length and format depending on the manufacturer and country. Some are shorter than 17 characters, and the position of the year code is not standardized. The 10th-character method does not work for these older vehicles. If you are researching a car from 1980 or earlier, you will need to consult the manufacturer's documentation or a classic car registry to confirm the model year.
For vehicles from 1981 onward, the 17-character format and the 10th-character year code are consistent across all manufacturers worldwide. This standardization makes it much easier to verify a vehicle's year, especially when buying used or checking recall information.
Why the year code matters when buying a used car
The model year affects insurance rates, registration fees, emissions testing requirements, and recall may be able to access. A car listed as a 2015 model but with a VIN indicating 1985 is either mislabeled or has a fraudulent title. Mismatches like this are red flags for title washing, odometer fraud, or salvage vehicles sold without proper disclosure. Before purchasing any used vehicle, verify that the 10th character of the VIN matches the year claimed in the listing and on the title.
You can also use the year code to cross-check recall information. The National Highway Traffic Safety Administration (NHTSA) maintains a searchable database of recalls by VIN. If you enter a VIN and the system returns no results, but the seller claims the vehicle is subject to a recall, the VIN may not be authentic or may belong to a different vehicle than the one you are inspecting.
Frequently Asked Questions
Can I tell the exact month a car was made from the VIN?
No. The VIN tells you only the model year, not the month of manufacture. Some manufacturers encode the build date elsewhere on the vehicle — for example, on a sticker inside the driver's door jamb — but this information is not part of the VIN itself. The title and registration may list the model year, but not the specific month.
What if the 10th character is a number instead of a letter?
If the 10th character is a number (0 through 9), the VIN does not follow the standard format or has been altered. A legitimate VIN from 1981 onward will always have a letter in the 10th position. A number in that position suggests the VIN is incomplete, incorrectly transcribed, or fraudulent. Do not proceed with a purchase until you verify the VIN directly from the vehicle's dashboard plate.
How do I know if a VIN has been tampered with?
The 9th character check digit is designed to catch tampering. You can calculate what the check digit should be using the VIN formula and compare it to the actual 9th character. If they do not match, the VIN has been altered. Many online VIN decoders will perform this check automatically. Additionally, if the 10th character does not match the year on the title, or if the first three characters do not match the claimed manufacturer, the VIN may be fake.
Do all manufacturers use the same year code system?
Yes. Since 1981, all manufacturers worldwide — whether building cars in the United States, Japan, Germany, or elsewhere — use the same 30-year cycle for the 10th character. This standardization is mandated by international automotive standards, so you can use the same year code chart for any vehicle from any manufacturer.