Well I've had the tailgate trim replaced a a few times already. First time was completely stupid. Was hauling a couch with tailgate down. Maybe 65MPH and the wind catching in the sides broke the tabs for the tailgate cap. Dealer replaced without issue. Second time I was standing on bed side loading freight and stepped on the tonneau cover rail that overhangs, bent down a bit. Went to close the tailgate; Broke the same tab again warranty no issue. Most recently broke it, well twice. Loading a ATV. Tire slipped and ripped the plastic, hadn't replaced it yet, and broke the spot next to it taking a dirtbike out without ramp. Oops.
Haven't gotten around to replacing that one yet. Don't think I can claim warranty. Ended up getting a cap and it got covered by the leer tailgate cover anyways. Good enough for now. That plastic cap is a crappy design. I don't care for it
But the regen or exhaust heat hasn't done any damage anyways!