Originally Posted by DL
That is exact symptom of the design flaw of the N52 from 2006-2009ish. Get the process of the fix started ASAP. There is allot of information in the last 10 pages of this thread. Give it a read, it will help. Good luck going forward.
A quick link that I have provided in the past. A bit dated, but will give you an idea. BMW is well aware of the design flaw, though not too fond of fixing it, as it is money out of BMW's bottom line - $$$$$.
My signature on Utube I have provided information too...
Thank-you (and all the posters in this thread) very much for all that info. Mine sounds exactly the same as your youtube vid, so I'm going to take some video in the AM, get a solid recording of the sound, then call the dealer.
Glad it's under CPO warranty for another 15 months!
I'll keep y'all updated.