SACRAMENTO - Today the California Air Resources Board issued an In-Use Compliance letter to the Volkswagen Group about recent testing that yielded evidence of defeat devices related to the emissions control technology in cars and SUVs that use a 3.0 liter diesel engine.  

The vehicles involved in this letter are the 2014 VW Touareg, the 2015 Porsche Cayenne, and the 2016 Audi A6 Quattro, A8, A8L and Q5.  The U.S. EPA also issued a Notice of Violation today about the presence of a defeat device in these same models. 

The ARB In-Use Compliance letter can be found here (https://www.arb.ca.gov/newsrel/in_use_compliance_letter_110215.pdf)

The U.S. EPA Notice of Violation is here (http://yosemite.epa.gov/opa/admpress.nsf/21b8983ffa5d0e4685257dd4006b85e2/4a45a5661216e66c85257ef10061867b!OpenDocument)

A U.S. EPA Q&A is here (http://www3.epa.gov/otaq/cert/violations.htm)