[ft1330]

In my opinion you're going nowhere with this poll. Sorry to be so harsh. I'm the OP of the second thread you've linked and I've got some serious research experience on this topic due to my own issue.

This is not "one" issue that is the same for everyone, but several possible issues that all sound the same. It *may* be coming from the HUD, the HK, the screen, the air vents, the cowling, the heat shields, the radiator, the transmission, a broken dashboard brace weld, the cup cover, the sun visors, etc, etc. Yes I have seen people had their cars fixed and this is a short list of all the various issues that were found, and that triggered this exact same vibration for all of them. The reason it's around that RPM range is because it's when the engine vibrates the most. Believe it or not I have verified this with other car brands, 2,500 rpm is always when you get the acceleration rattles.

The truth is that vibrations all sound the same and are transmitted in mysterious ways. IF you can reproduce the noise on demand then it's an easy fix for your dealer. If not then you're in trouble, as I am. Because I can't get the car to do it on demand, the dealer can't pinpoint it.

It's definitely a noble effort to want to get BMW's attention on this but it's unlikely this will result in anything more than "call your dealer", since they know this can come from so many different sources.