A U.S. auto safety agency opened an investigation into roughly 30 million vehicles over possible faulty airbag inflators on Friday, affecting over 20 automakers, Reuters reported, citing a government document it reviewed.

The vehicles, with model years from 2001 and 2019, could have potentially faulty air bag inflators that were manufactured by Takata Corporation, according to the National Highway Traffic Safety Administration, which opened up an investigation into the affected vehicles, according to Reuters.

The news wire noted the probe had not yet been publicized but the agency has notified the companies.

Takata air bag inflators have been previously recalled over metal elements causing potential explosions with faulty inflators. More than 100 million inflators have been recalled over the last 10 years, including 67 million in the U.S. alone, Reuters reported.... Read More: The Hill