The U.S. auto safety agency has stepped up its probe into engine fires of some of Hyundai Motor Co and Kia Motors Corp vehicles for over six years.
The National Highway Traffic Safety Administration (NHTSA) has opened an “engineering analysis” into up to 3 million Hyundai and Kia vehicles.
NHTSA’s is primarily probing the efficacy of recalls initiated by the two automakers, Reuters reports.
The agency added that it was aware of 161 fires occurring potentially due to engine failures.
Reuters recounts that the agency had opened an investigation in 2019 covering the 2011-2014 Kia Optima and Sorento and the 2010-2015 Kia Soul, along with the 2011-2014 Hyundai Sonata and Santa Fe to investigate instances of non-crash fires.