Hi all,
A few yanks have found this as has Macca over in WA.
On your JK wrangler there exists the possibility for your quarter panel to rattle against the bodywork.
I do not know what the Dealer fix is, but I performed my own:
I hammered this panel in just a little bit (is still 2mm of clearance between these bits of metal).
And added some HD insulation.
I had my quarter panel off for other reasons. Most others just jam something between the two.
Goodluck