I just noticed recently that my 2004 5-door Mazda 3 is making some noise when I drive at very slow speeds (like pulling into a parking lot). It seems to be irrelevant of engine speed and steering. Sounds like "psh psh psh"... any ideas?
Funny that you asked, my 04 m3 hatch makes a flapping noise at high speeds I just noticed that the other day when I hit 90 on the highway. I checked and there's nothing lose, i have no idea what it could be.
I had a similar problem, when flooring the gas i had a vibration from the engine bay, turns it was a broken engine support, that made the vibration, and the noise was from the vibration in between the cars metal and a part of my HID system... replaced the engine mount and tightened the ballast with an extra cable Tie and voila!