One problem related to warning light on has been reported for the 1999 SAAB 9-3. The most recently reported issues are listed below.
While parked, I put my key in the ignition and started the car. My passenger side side impact airbag deployed/exploded upon engine starting. I suffered a concussion, tinnitus, and inner ear damage from the airbag exploding. Took car to a gm dealership with a SAAB technician to have car diagnosed to explain why the airbag deployed/exploded. No diagnosis made. But they did read error code saying airbag sensor communication failure after airbag deployed/exploded. No warning lights were lit prior to incident. There were no service codes prior to incident either. (I had car checked 1 week prior to incident).