2003-2004 Toyota Corolla S

The auto industry's airbag troubles deepened on Saturday, as federal regulators said three big automakers will recall about 2.1 million older vehicles to fix defects that could cause airbags to deploy when they are not supposed to.

Toyota Motor, Fiat Chrysler Automobiles and Honda Motor have issued three earlier recalls to fix problems with a defective chip in the affected airbag systems. But the National Highway Traffic Safety Administration said on Saturday that "a small number of vehicles" fixed under those earlier actions had experienced inadvertent air bag deployments, hence the new recall.