"NHTSA has received information indicating that [Honda] failed to report incidents involving Takata air bags," the agency said in a statement. "NHTSA is also concerned that Honda's reporting failures go beyond the Takata incidents." Honda has contracted a third-party audit of potential inaccuracies and "will soon share" its findings with NHTSA, according to Reuters. Federal regulators in June asked automakers for assistance identifying suspect air bags made by Takata Corp, Honda's biggest supplier of the device. There is a chance the air bags and inflators can explode with excessive force and spray metal shards into vehicle occupants. Ten global vehicle manufacturers that use Takata air bags have recalled more than 10 million cars in the United States since 2008, according to Reuters.