- Polaris appears to issue VIN's in the same 17 dogot format as required for on road vehicles. The first 8 digits provide information about the type of vehicle, manufacturer, and country of manufacture. The 9th digit is a check digit computed by a mathematical formula too complex to get into here. The 10th and 11th digits correspond to year and the plant that the vehicle was manufactured at, and the last 6 are the actual sequential serial number. All that being said, that VIN would indicate a model year 2007.