Zengineer
Well-Known Member
It's either a sink mark from the way the material flows or cools at each attachment tab location, or a buckling of the plastic because the metal and plastic surfaces are not coordinated.
Most likely is that there is an intentional design gap between the attachment surfaces (in nominal "perfect" parts) so that any variation would not create a gap between the visible surfaces of the metal quarter panel and the plastic bumper cover (fascia). Parts vary, especially a flange on a stamped steel quarter panel, and they decided a little distortion in the plastic is better than the panels gapped away from each other.
Most likely is that there is an intentional design gap between the attachment surfaces (in nominal "perfect" parts) so that any variation would not create a gap between the visible surfaces of the metal quarter panel and the plastic bumper cover (fascia). Parts vary, especially a flange on a stamped steel quarter panel, and they decided a little distortion in the plastic is better than the panels gapped away from each other.
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