The EPA has found that even vehicles with Volkwagen’s 3-liter TDI engine, such as this A7 Quattro, include software to defeat emissions testing.
Josh Miller/CNET

The one silver lining Volkswagen could point out during the revelations that it had cheated on its diesel emissions testing was that its larger 3-liter V-6 TDI engines were unaffected, but that lining tarnished this morning as the EPA issued a notice that it had found a similar device for evading emissions testing in V-6 TDI vehicles from the Volkswagen, Audi and Porsche brands.
In September Volkswagen admitted to rigging its emissions testing, engaging a different engine program when its vehicles were hooked up to testing equipment than when they were driven normally on the road. Estimates suggest that emissions on the road could have been 40 times worse than in the testing environment. The initial EPA investigation and Volkswagen’s own admission found that vehicles with its 2-liter four cylinder TDI engine were in violation of EPA rules.
A new notice posted this morning on the EPA’s Web site and sent to Volkswagen includes vehicles using the larger 3-liter V-6 TDI engine. The notice lists those vehicles as the “VW Touareg”, “Porsche Cayenne”, “Audi A6 Quattro, A7 Quattro, A8, A8L, and Q5”.
When contacted for comment, Volkswagen sent a prepared statement noting it is reviewing the new notice and “fully cooperating with the EPA’s investigation.”

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