I've had my R/T for about 3 weeks now;
and my airbag warning light was coming on. 
Now remind you I do have to haul my kids around, and I figured them getting in and out of the back seat might have loosened up the plug and receptacle. God only knows, they don't appreciate the MOPAR like Daddy does, sometimes I think they’re the trying to shove the passenger seat through the front windshield, 
so anyway after doing a little research, I did find out, that this is an issue with the Challengers. I had arranged to have the service guy at the dealership take a look at it, but the more I thought about some other man putting their hands all over her, the sicker It me feel. 
My initial look under the passenger seat was really overwhelming with a couple of wiring harness and a shit load of wires staring at me, once again the sick feeling started resurfacing, but not to be discouraged I pressed on. I remember reading where the plug had two wires running from it, so I trudged on looking for the nemesis. I did finally find a plug, that fit that description located on the side of the seat next to the center console. The plastic male end being square in geometry is plugged into a metal round receptacle, even from the first glance, it looks poorly engineered. I pressed on it a little and moved the wires around, and sure enough the airbag warning light went off. I don’t know if what I did caused the light to go off, but I do know I sure slept better knowing, that another man was not going to being touching her down there. 