This is my first and last BMW I ever buy, in only 5000 miles of ownership is just one thing after another. This sound started about 2 weeks ago but I just noticed it was that bad. But when idling and bringing the rams to 2000-2500 it is clearly a knocking sound. Engine hasn't been starved of oil and oil change was done about a month ago. No check engine light, engine otherwise is smooth, no hesitation, no power loss, accelerates strong.

Let me add that there is no white smoke, no oil leaks, check the seals around engine all clear.

It does that knocking after engine is warm, if I rev to 2000 rpm with engine cold it does not makes the knocking sound.

What you guys think this is?

https://www.youtube.com/watch?v=KO_upc4Op10

Then I saw this part today kind of vibrating, is this normal, I didn't have anyone to rev the car to see if it was coming from that part.

https://www.youtube.com/watch?v=KO_upc4Op10