The new revelations affect Volkswagen, Porsche, and Audi cars equipped with 3.0-liter diesel engines. Previously, the EPA had charged in a Nov. 2 Notice of Violations that certain cars from the 2014, 2015, and 2016 model years equipped with the engines contained the illegal software.
But now, the EPA says the issues identified in that second Notice of Violations now extend to vehicles equipped with the 3.0-liter engines from all model years 2009 through 2016. Approximately 75,000 more cars are now affected in the US, according to the EPA, meaning the total of 3.0-liter engine cars containing defeat devices is now 85,000.
Previously, approximately 482,000 cars equipped with 2.0-liter engines had been marked since the scandal broke in late September.
"EPA and CARB will continue to investigate and will take all appropriate action," an EPA spokesperson said in a written statement.
The latest revelations come only days after Volkswagen's Michael Horn, CEO of North America, repeatedly apologized for the diesel cheating during remarks made at the Los Angeles Auto Show.