Porsche & Audi 3-Liter Diesel Engines Now Under Scrutiny By EPA


Published on November 3rd, 2015 | by Daniel Sherman Fernandez


Porsche & Audi 3-Liter Diesel Engines Now Under Scrutiny By EPA


The Environmental Protection Agency (EPA) has revealed that other diesel engines may be affected by the Volkswagen emissions scandal after finding evidence of a defeat device on 3.0-litre TDI Audi, Porsche and Volkswagen models.

The defeat device “increases emissions of nitrogen oxide (NOx) up to nine times EPA’s standard,” says the U.S. agency which has issued a second notice of violation of the Clean Air Act to Volkswagen AG.


The EPA states the following models are affected:

  • 2014 Volkswagen Touareg
  • 2015 Porsche Cayenne
  • 2016 Audi A6 quattro, A7 quattro, A8, A8L, Q5

The latest violations affect around 10,000 cars sold since the 2014 model year, plus “an unknown volume of 2016 models”. The latest Volkswagen Group Clean Air Act violation was discovered during a randomised screening process of U.S. diesel cars conducted by the California Air Resources Board.


The EA 189 2.0-litre TDI is the engine in question. Since then, Volkswagen’s share price has plummeted as the firm has found 11 million vehicles worldwide contain defeat device coding.

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