The 8N7837031B supersedes to 8N7837031C, then to the 8N7837031D, and does this for the 032B, to C, to D as well. In tracking this part number change it only applies to the TT roadster. Coupes don't use this part nor do other models in the Audi line. I was hoping to get more information from other models including VW but I have nothing that tells me anything on why this change was made or if it's recognized that the part is physically different in the outer thickness as per your picture. I can only assume Audi did this for a reason and that the part should work. If it doesn't, as in the bolt pattern is wrong for example, I can call Audi. Then send the pictures you sent to me, and see if they can come up with an answer to this problem. See if the 2 bolt holes line up first, then test fit these new ones to the open door before installing them in the car to make sure the contour is a mate/match to the old ones. If something looks wrong, write down a detailed description so I can forward this to Audi with pictures and we'll figure it out.