It is working fine, however I am not monitoring all the numbers like some of our more advanced members here.
Never had a check engine light come on, or any other issues. Last time took my GC for service at the dealership, did not even take it off, they do not notice it.
Overall, take off is quicker and freeway power is way up, it acts like gas car with turbo on the freeway. Average MPG is 20-21, half city, half freeway.
06 Touareg V10 TDi