Not sure if this has been addressed in this forum but check your rocker panels at the wheel wells for cracks/splits. I was made aware of this at another forum and would not have noticed until detailing time. It should be covered if you are not yet out of 3year/36k warranty. Call this number NOW: 1-800-992-1997. Both sides of my Challenger now on order but you have to bring it in to a dealership for inspection. Good luck.
This has been an ongoing problem since 2009. Mine cracked and I had them replaced under warranty. Now, one of the replacements has cracked. Also, my window door trim has cracked. Very cheap plastic trim was used on these cars.