Hello all, I just bought my first car in September and I thought it sounded like the perfect car...until I started driving it more. Now I noticed that when I slow down to a slow speed, that it makes a hard thump. Also the air bag light is on, is that a good sign or a bad sign? I know I sound like a dummy but this is my first car and I have no idea about any of this. Please, any advice would be appreciated. It's a 1996 Hyundai Sonata 6CYL with 130,000 if that information helps. Thanks!