Hi folks,

I have this annoying, squeaky noise coming from the engine area of my 2011 535i MSport. I've had it for a while now. Back in May, 2016 the belt tensioner and idler pulleys were replaced by a mechanic thinking this was the fix. The same squeaky noise came back. I included a sound file. You can actually hear the noise really well in the last 8 seconds.

https://drive.google.com/file/d/1BT7...xbHnc3fbP/view

Any ideas? Thx.