17 characters. The VIN is decoded via NHTSA vPIC, then all recalls for that year / make / model are pulled from NHTSA.
Important: NHTSA data shows recalls for the model and year. It does not confirm whether the recall is still open on this exact VIN.
For VIN-specific open status on heavy trucks, check the OEM dealer/owner portal (Freightliner / Western Star, Kenworth / Peterbilt, International, Volvo / Mack) or the
NHTSA recall lookup.
Engine, tire and aftermarket-equipment recalls (e.g. Cummins, Detroit) may be filed separately from the truck.