The 17 characters split into six parts: WMI (positions 1 to 3, manufacturer and country), VDS (4 to 8, vehicle description), check digit (9), model year (10), plant (11) and serial number (12 to 17). The tool's table shows each position in its own color. The letters I, O and Q do not exist in a VIN so they cannot be confused with 1, 0 and 0.