Originally Posted by gazetobg
Which NOx did they replace, do you know?
the one behind the engine or the one under the car?
i have exact same codes on my 2012 Q7 TDI and i need to know which one is bad? which one is bank 1...
Any help will be appreciated.
I do not know for sure. I assume it was the upstream nearer the engine being bank 1. That is how O2 sensors are labeled on my 2001 TT. The dealer techs did talk to Audi and told me that I was getting a new software update. The good part is that it has been perfect for over 7000 miles since then. Good luck with yours!