Hi
I have also been stung with the Ad blue pump failure on my 2016 Q5 2.0 tdi , I have also been on the wrong side of a hefty repair bill although mine was only for £2150. Since this little escapade I have lost all confidence in the marque, and am looking to get rid when a suitable replacement takes my eye. lovely motor very comfortable and a pleasure to drive, but not what I expect from the Audi brand when the vehicle at the time had only done 31k.