Two problems related to air bag light on have been reported for the 1999 Buick Century. The most recently reported issues are listed below.
Air bag light stays on. Dealer notified.
Passenger airbag light on--means airbag will not/may not deploy if in an auto accident. Dealer sharpe Buick replaced module approx 3 times but problem still exists. I was told that airbag light had to stay on constant before they could do anything, light is always on and problem was still not resolved. Also antifreeze leaking due to leaking lower intake gasket which has been leaking for years also taken to sharpe Buick several times they didn't see a problem even when there was a smell at the dealership. Also the instrument panel cluster was replaced it starting dimming and finally went black. I have recently paid for these repairs. Car came with manufacturer warranty when I purchased the car and I also purchased an extension on the manufacturer warranty from the car dealer sief chevy/Buick in hastings mi where I purchased the car.