My car is making this annoying vibration noise from my left passenger side window at around 5000 to 6000 rpms. Before 5000 I do not hear it, and then after 6000+ you dont hear it. Only between 5-6k you hear it. The noise is extremely annoying b/c it is drowning out the sound of the engine. It seems that if I have my window down, I don't hear it but when I have it up I hear it.

It has to be the window. Has anyone else experienced this too? Help

BTW: 2005 S w/ 3,000 miles on the ODO