Not Buick related, but my dash light for my airbag came on today. Also get that annoying chime. Car has 47k miles. I want the bag to work in an emergency. What should I do? Can I diagnose it myself? Where is the sensor located? Also, about a month ago. my neighbor backed into it. I was on the street and he was coming out of his driveway. Bodyshop didn't think this is accident related as it was just dented from the side. Driver front fender and headlight got hit. Could it be related? Thanks.