Company spokesman John Hanson says one soft material beneath the seat covers doesn't comply. No fires or injuries have been reported. Toyota is still totaling how many vehicles are affected, but it will be in the thousands.
The move affects Camry, Avalon, Sienna and Tacoma models from the 2013 and 2014 model years. Also covered are Corollas and Tundras from 2014.
It's not clear what will happen with vehicles that have already been sold. Hanson says Toyota has reported the problem to U.S. safety regulators, who will decide if the vehicles must be recalled.
The Camry is the top-selling car in the U.S., with more than 408,000 sold last year.