Driving my 05 S down a dirt road tonight and in the road was a washed out area. Drove into it...well more like flew into it. Dented in one area of the black plastic bottom piece along the bumper. Looks like I can take it off and pop it back out though. Still sucks. Was kinda suprised the airbag didn't go off I hit so hard.
Apparently it takes a whack directly to the bumper to trigger the air-bags. When my 2002 MCS got hit (& totaled), the air-bags did not deploy. Being that I slid into the back of a GMC Sierra pickup, the bottom of his bumper was about 3 inches above the top of mine and went into the top grill/bonnet and left headlight. $5300 damage estimate and the air-bags had not deployed, but the ABS faulted and would not reset.