WASHINGTON: U.S. auto safety investigators have opened a new probe into 30 million vehicles built by nearly two dozen automakers with potentially defective Takata air bag inflators, a government document seen by Reuters on Sunday showed. The National Highway Traffic Safety Administration (NHTSA) on Friday opened an engineering analysis into an estimated 30 million U.S. vehicles from the 2001 through 2019 model years. StarCarSifuThe 30 million vehicles include both vehicles that had the inflators installed when they were manufactured as well as some inflators that were used in prior recall repairs, NHTSA said in the document. The 30 million vehicles that are part of the new investigation have inflators with a "desiccant" or drying agent. Earlier this year, NHTSA said of the 67 million recalled inflators, approximately 50 million have been repaired or are otherwise accounted for.- Reuters