My 2013 TDI with 33,745 miles had a NOx failure. It cost $1034.92 at VW Alexandria to get it fixed. A friend who also has a 2013 also had his fail. Lucky for him his dealership covered it under warranty. This seems like a very common failure. Anyone have any luck getting VW North America reimburse them for this expense? Why is this item not covered by the emissions warranty?