Hyundai overstated the gas mileage of its revamped Sonata sedan in publicity material for the media, according to a news report by The Associated Press.
According to automaker, it was a mistake that a tentative mileage figure from internal tests was included in a presentation to reporters.
The government said that the mileage of the upcoming Sonata was 28.4 miles per gallon instead of the 29.6 mpg Hyundai reported on March 4.