Having just endured a total cluster mess with the local dealership and VW USA over what is and what isn't covered under the EPA mandated 8 year 80,000 mile emissions warranty (they wanted $800 to replace one of the NOX sensors at 41,000 miles) - here is the handy Q&A PDF from the EPA website - it is very comprehensive and clear - might want to print and put a copy in your glove box - http://www.epa.gov/obd/pubs/420f09048.pdf
Now we have an appointment for a warranty replacement of the sensor.
Now we have an appointment for a warranty replacement of the sensor.