I just had the AdBlue refilled at 6000 miles (the 1500 mile warning had just popped up). 600 miles later, an AdBlue system fault pinged up and the "will not restart after 650 miles" warning was displayed.

Audi road side assistance diagnosed a faulty adblue pump, so the car is now in having the whole tank and pump assembly replaced.

Has anyone had or heard of this problem? The Roadside assistance chap had pictures on his phone of another Q7 where he had the same problem and replaced the tank on the road side. I am curious if this is a well known problem?