Reviewed by Which in 2014, they said, "The Lexus NX complies with emission limits in official tests. However, when faced with our own, more realistic emission tests, the amount of CO (carbon monoxide) produced was so vast that it would not only fail all EU emissions limits set this century, but the Euro 1 limits from 1992 - despite it being a hybrid."
I knew this before I bought mine in 2019 and it didn't put me off. I also wrote to Which to ask them to retest as there have been a few tweaks since then. Looks like they never did, so still quote this fact all the time. ☹️