DETROIT (AP) — The U.S. government is adding more than 3 million vehicles to a rare warning about faulty air bags that have the potential to kill or injure drivers or passengers in a crash.

The National Highway Traffic Safety Administration on Wednesday put out a new list of vehicles, increasing the number from 4.7 million to 7.8 million. The agency urged people to get their cars repaired if they're being recalled, especially in Florida and along the Gulf Coast.

The air bag inflators made by parts supplier Takata can rupture, causing metal fragments to fly out when the bags are inflated. Safety advocates say at least four people have died from the problem.

The warning covers many models from BMW, Chrysler, Ford, General Motors, Mazda, Honda, Mitsubishi, Nissan, Subaru and Toyota.