Had the same issues on my A5 and thank goodness for this forum and Google, otherwise as others have had the misfortune of a new ABS unit, I did order mine from EBay but when it didn’t turn up got it from local Audi dealer apparently like others it had been on back order so I was lucky it was in stock, fitted in 10 mins and as others all is good, savings made and no costly ABS repair, still wrong on Audi’s part but doubt anything will change, keep up the great work the posters who gave the great step by step guides that even a non mechanical person could follow 👍