Chrysler-parent Stellantis is urging owners of 276,000 older U.S. vehicles to immediately stop driving after three crash deaths tied to faulty Takata air bag inflators were reported in the last seven months.

The “Do Not Drive” warning is for owners of previously recalled 2005-2010 Dodge Magnum station wagons, Dodge Challenger coupes, and Dodge Charger and Chrysler 300 sedans who have not yet addressed Takata driver-side air-bag recalls.

Stellantis said replacement driver-side air bags have been available for the vehicles subject to the stop driving notice since 2015.

More than 30 deaths worldwide and hundreds of injuries in various automakers’ vehicles are linked to Takata air bag inflators that can explode, unleashing metal shrapnel inside cars and trucks.

Stellantis said it had made more than 150 total contact attempts to try to convince the owners of the vehicles involved in the three fatal crashes to get recall repairs completed.

Most of the deaths reported have been in Honda Motor vehicles.

The National Highway Traffic Safety Administration (NHTSA) said Thursday it had confirmed two people died in separate crashes involving 2010 Dodge Chargers where the Takata driver’s side air bags exploded. Stellantis said a Takata air bag was suspected in a third death.

The NHTSA said it was aware of several other suspected inflator ruptures in vehicles from other automakers potentially due to exploding Takata air bags. There have been more than 400 U.S. injuries reported tied to Takata air bags.

Over the last decade, more than 67 million Takata air bag inflators have been recalled in the United States and more than 100 million worldwide, in the biggest auto safety callback in history.

“Left unrepaired, recalled Takata air bags are increasingly dangerous as the risk of an explosion rises as vehicles age,” said NHTSA Acting Administrator Ann Carlson.

The NHTSA says Takata recalls were spurred by propellant that could break down after long-term exposure to high-temperature fluctuations and humidity.

Last year, the NHTSA opened a probe into 30 million vehicles built by nearly two dozen automakers that have potentially defective Takata air bag inflators.