According to documents released Wednesday from the U.S. National Highway Traffic Safety Administration (NHTSA), the recalled inflators were “interim remedy parts” or “like-for-like” replacements intended to be used as a temporary fix. They contained phase-stabilized ammonium nitrate propellant, which may “cause metal fragments to pass through the air bag and into the vehicle interior at high speed, which may result in injury or death to vehicle occupants.”

The recall may affect some vehicles made by Audi, BMW, Daimler Vans, Ferrari, Fiat Chrysler, Ford, General Motors, Honda, Mazda, Mitsubishi, Nissan, Subaru, Toyota and Volkswagen, according to the government documents.

“Long-term exposure to high heat and humidity can cause these airbags to explode when deployed,” according to the NHTSA. “Such explosions have caused injuries and deaths. The agency also urged vehicle owners to take a few simple steps to protect themselves and others from this very serious threat to safety.”

However, the government documents indicated that only one percent of the vehicles affected by the recall are estimated to have the defective airbags.

The NHTSA said that if a consumer’s vehicle is affected by the recall, then the consumer should have received a notice in the mail from the vehicle manufacturer. If they have not received a notice, but want to check to see if their vehicle is included, they can look it up on the NHTSA’s Recalls Look-up Tool.

This particular recall is the final one that the company—which filed for bankruptcy in 2017—agreed to issue per a 2015 deal with the U.S. government, and could end the “largest series of automotive recalls in U.S. history,” The Associated Press reported.

“We are going to lean in on safety and if we detect a safety problem we will immediately take action,” acting NHTSA Administrator James Owens said in an interview with Reuters. He said that the agency was collaborating with automakers and reviewing data about the faulty airbag inflators.

Takata issued a separate recall in December 2019 for about 1.4 million airbags containing Non-Azide Driver (NADI) inflators, which could underinflate or explode when deployed.

As previously reported, defective airbags manufactured by Takata have been linked to over two dozen deaths and hundreds of injuries across the globe.