How to Read a Chassis Number
A chassis number is the 17-character code that uniquely identifies a vehicle. Here is how to read one, character by character, and what each section tells you.
Checking a specific car? Get the full vehicle history report from China Vehicle History.
The 17 characters, section by section
A chassis number splits into three parts: the World Manufacturer Identifier (characters 1–3), the Vehicle Descriptor Section (4–9, covering model, body, and a check digit), and the Vehicle Identifier Section (10–17, covering model year, plant, and serial number). Character 10 encodes the model year and character 11 the assembly plant.
Where to find the chassis number
Look on the dashboard by the windscreen, on the driver-side door frame, and in the registration documents. All three should match. Enter all 17 characters exactly for an accurate decode.
Decoding it for free
Enter the chassis number into a decoder to confirm the make, model, year, and plant. That identity check is the starting point before a full history report for accident, mileage, and registry records.
FAQ
Is a chassis number the same as a VIN?
Yes. They are the same 17-character identifier. 'Chassis number' is the common term across the Gulf, South Asia, and Africa; 'VIN' is used in North America and Europe.
How many characters is a chassis number?
A modern chassis number is 17 characters — a mix of letters and numbers, with the letters I, O, and Q excluded to avoid confusion with 1 and 0.
Verify before you buy
Decode the chassis number free, then unlock the full vehicle history report for accident, mileage, and China registry records.
Get the full history report →