Yeah. Just read the other thread. What Ace said about a solid mount carrier bearing makes sense, and he certainly has a fair amount of experience with it on the x3.Took it back to the dealer and they installed the "set-screw" that was supposed to fix the issue. It made no difference. The annoying rattle is still there, in 2 wheel drive, between about 3500 and 4500 rpm, above that it goes away and in 4 wheel it goes away. Dealer couldn't find anything is wrong with it. It sucks.