Thanks for the help guys, managed to get 1 from the Audi dealership, coming to me straight from Germany. Don’t know why my garage didn’t check but anyways problem solved 👍
Many thanks to Simon Ryder and to this forum !
The number on my failed sensor is 1606060544094 so the manufacturing period spanned at least two months. I guess that many more Audi owners are about to experience the same problem.