I'd like to share my recent experience with the air bag light in my 2007 Explorer. The light began coming on during the very cold weather we had in December. I read advice from people who adjusted wires under the front seats. Doing that would make the light go off, but the next time I drove, it would stay on again. While this was going on, it happened that the 4 year old battery was dead two mornings in a row, although the car started fine for the rest of the day after being jumped. As soon as I replaced the battery, the air bag light stopped being a problem. It comes on at ignition, then goes off and stays off.