VGIS issue.

Hi guys.
It seems the VGIS flaps in the intake are chattering when the car (09-11 F16D3 model) is revved above 2k.

I've heard the plastic shaft that moves the flaps sometimes breaks.

Is there any way to open the intake to check if it's broken? Or is there a way to check without opening it?

What on eart is a VGIS flap?

Inside the intake are flaps that form part variable intake geometry system. I don't know if your comment is genuine or sarcastic. But the flaps move to shorten or lengthen the intake runner length.