Here's the thing they already replaced the TURBO. I didn't have a chance to listen yet but it's as if two spoons were clanking against one another for the first several seconds and then it goes silent and I heard that on a '16 535 so maybe it's "normal" but a 50i doesn't do it so why mine? I am worried if I buy out the car after lease up in feb what happens if something related to this breaks