I need information concerning the airbag light. Can this light be reset? Is there a way to determine what part has failed or sensor? the location of the sensor. The other item I have is the PCM or computer. Has anyone used a unit from a salvage yard? Does a salvage unit need to be reprogramed by the dealer? How can I know if the salvage unit is correct with mine? Has anyone used one of the online repairs companies? I know it is a lot...Thanks for your help and time.