I installed these vent visors on my 2014 Engeri and so far I have NOT bounced back when going up. The rear visors make a lot of noise at high speed 75-80 mph when the window is completely down, standard noise if partially open. My windows do bump the visor when going up as I see them move slightly, hopefully additional bedding time will fix this as temperatures are low. If you follow the instructions the front and back vent visor installs outside of the window channel at the B pillar. They should be inserted between the B pillar and rubber moulding.