My husband bought this truck 4 years ago when it had like 42000 miles on it. Not long after the airbag light came on. Retuned to dealer several times till the problem was fixed and now the truck has 84441 miles on it and the airbag light is back on. Why when it has accumulated 42000 miles is this problem returning. Is there a sensor or something that is causing this to happen. The truck has never been in an accident.