Rear passenger windows...

Any vehicle that is very air tight will do this. My 2003 Highlander also does it. If you know how air flows over an airplane wing, this is similiar. When you are moving down the road the airflow on the side of the car causes a low air pressure zone just like a airplane wing, low air pressure on top causes the high air pressure under the wing to push up on the wing itself. Therefore, when you open the rear window just a little, the inside air pressure is higher and the air is getting sucked out the window; this lowers the inside air cabin pressure similiar to an airplane cabin on take off. If you hear or feel and continuous air popping noise this is caused when the cabin air pressure gets to a point where the air pressure is lower than the outside air and air rushes in the small opening of the window, hense the inside air pressure increases but he outside air pressure is lower, and the cycle starts again. This is nothing new. I seen this as a kid in VW's that advertised the tighness of the VW bug.

I have not heard of anyone complain of this before. I must look for this the next time I drive one at work, at what speed does it start? I couldn't think of the name but they make wind deflectors, I wonder if they would help. I found a link to a web page that has pictures of the wind deflectors. http://www.buyautotruckaccessories.com/automotive-categories.cfm/cf-bin/cn.wind-deflectors/make.30/gid.101007004/