Installed wrong? 2 screws and a gasket?It use to make square hole round for smooth air flow. They could not mold the plastic with it in place so they made it a separate piece. I never heard of one coming out place on its own. Probably was installed wrong in the first place. It is install so your can smoothly round the corner.
The PN you listed is the gasket and not the assy. Correct PN is 796703 according the IPL.
i think star was referring to the extra plastic piece that fits in the mold.Installed wrong? 2 screws and a gasket?
slomo