Srs light is on (Srs-Air Bag Service-Urgent), just got the car 3wks ago...Rec.no service rec. W/it, owner son said T-belt was change at 175mi, 2004 v70 210mi..so far so good, looks like it was taken good care of. ?=is the (Srs-Air Bag Service-Urgent) is this can this be a big deal? tks for any help....