With the sunroof open I get a pressure fluctuation thrumming sound when driving between 30 and 40. I thought maybe the car doesn't have one of those pop up deflectors that tend to stop this sort of thing, or that it was broken, but there it is, working ok. If I put my hand into the airstream the thrumming stops.
Do they all do this or am I missing something?
Do they all do this or am I missing something?