Why are VINs exactly 17 characters?

The 17-character length was standardized in 1981 by ISO 3779. This length provides enough space to encode all necessary information while remaining manageable. All vehicles manufactured after 1981 must have a 17-character VIN.

Why can't VINs contain I, O, or Q?

The letters I, O, and Q are excluded from VINs to prevent confusion with the numbers 1 and 0. This reduces errors when VINs are read or transcribed manually.

How do you know which year a year code represents?

Year codes cycle every 30 years. For example, 'A' represents both 1980 and 2010. Context clues help determine the correct year: vehicle age, manufacturer history, and other VIN positions. Modern vehicles (2010+) typically use the more recent year in the cycle.

What is the purpose of the check digit?

The check digit validates the VIN's integrity. If any character is changed, the check digit will no longer match, indicating an error or potential fraud. This is especially important for vehicle registration, insurance, and law enforcement.

Why do manufacturers have multiple WMI codes?

Manufacturers often have multiple WMI codes because they manufacture vehicles in different countries or regions. For example, Toyota has different WMI codes for vehicles made in Japan, the US, Canada, and other countries. Some manufacturers also use different codes for different vehicle types or brands.

Where can I find my vehicle's VIN?

VINs are typically found in several locations: driver's side dashboard (visible through windshield), driver's side door jamb, vehicle registration documents, insurance card, vehicle title, and engine block (some vehicles).

Schéma anatomique du numéro d'identification de véhicule à 17 caractères

Guide de référence VIN complet

Guide du numéro d'identification du véhicule (VIN)

Tout ce qu'il faut savoir sur les VIN : structure, décodage, codes WMI, recherche constructeur, codes année et validation. Parfait pour développeurs, propriétaires de véhicules et passionnés.

Décoder un VIN Générer des VIN

174

Constructeurs

649

Codes WMI

Pays

1980-2039

Plage d'années