And the Justice Department will never rest or waver in our determination to take action against any company that engages in such activities - whenever and wherever they are uncovered." Back in Novemeber 2012, Hyundai admitted after an audit of its mileage claims by the EPA that it had overstated the fuel efficiency for approximately 1.2 million vehicles, or a quarter of its 2011-2013 model vehicles sold in the U.S. The vehicles involved included models like the Elantra and Accent compact cars, the Santa Fe sport utility vehicle and Veloster coupe. Kia admitted to overstating mileage claims for its Soul and Rio vehicles. About 600,000 of Hyundai's 2011-13 models and about 300,000 of Kia's 2011-13 models are affected by the settlement in the U.S. The EPA was able to prove that the overstatements ranged from between 1 and 6 mpg, according to The Wall-Street Journal. Ford Motor Co. is among other automakers facing possible fines for similar practices.