Quote:
Originally Posted by kach22i
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I don't know.But my guess is that there's an inherent defect in the car's original design,and the flap is a cheap,add-on palliative to make up for the deficiency.
The rear bumper fascia has a profile which might produce bi-stable flow and 'booming.' If so,the flap would trigger separation,not allowing for any reattachment in this region,'fixing' the acoustic and inclement weather 'spray' annoyance.