air bag light is on. dealer said $475. to clear it. on 2011 Chevrolet HHR

My 2011 HHR air bag light came on, no accident no reason. Local dealer said sorry, 42,000 miles, out of warrenty. $475 to repair it. Any other options??

Asked by for the 2011 Chevrolet HHR
What part are they replacing?