Took my new to me E90 335i N54 to get a boost leak diagnosis. They were able to rule out a bunch of possibilities and get it narrowed down, to a busted vacuum canister. Without that part they couldn’t go much further as that could be a cause of the boost leak. However, I had a great opportunity to talk with the mechanic that worked on my car and he was great, he walked we through what other possibilities could be causing the boost leak if the new part didn’t solve it since I was going to replace that part myself.