It turns out Volkswagen may not be the only car that has cheated on emissions tests.
The Environmental Protection Agency has notified Volkswagen Group that it is investigating a 3.0 liter engine common to certain Porsche, Audi and VW models.
The 2014 VW Touareg, 2015 Porsche Cayenne and the 2016 Audi A6 Quattro, A7 Quattro, A8 and Q5 are thought to have “defeat device” software installed that helps these cars pass emissions tests. When the cars get back on the road, they begin emitting higher (and potentially harmful) levels of nitrogen oxide. “We have clear evidence of these additional violations and we thought it was important to put VW on notice and to inform the public,” Cynthia Giles, an EPA assistant administrator, told the Financial Times.