My son was driving my 2007 hyundia tiburon, on the highway, when all of a sudden the car lost all it's stearing capability, he hit a speed limit sign vered off the road and went about 50 feet into the woods, the airbags never deployed. luckly my son is ok, the car is a total loss. why would the airbags not deploy with the front end is destroyed and the frame is bent.