A U.S automaker is urging owners of about 225,000 older Chrysler, Dodge, Jeep and Ram vehicles to stop driving them immediately because of dangerous, unrepaired “Takata” airbag inflators.

At least 28 people have died and another 400 have been hurt because of air bag defects.

A “do not drive” warning has been issued for thousands of Chryslers, Dodge, Jeep and Ram vehicles that still have unrepaired Takata air bags.