Two problems related to warning light on have been reported for the 2007 Buick Lacrosse. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Buick Lacrosse based on all problems reported for the 2007 Lacrosse.
Intermittent air bag warning light goes on and off for passenger seat whether or not the seat is occupied. This has continued for two years. On-star failure code is always b0092. I took the Buick to a dealer who attempted to fix it twice without luck. The thrid trip for a "fix" would have cost me $ 1,200 without any guarantees. It still is in use but I now keep my fingers crossed. This happens when parked or driving.
The airbag warning light comes on while the car is traveling indicating the airbags are malfunctioning. It comes on and off intermittently. I brought in to the dealer and they cleared the malfunction code and it happened again. They want to change the sensor under the seat for $1250 since it is not covered by warranty. It seems to occur when the car is in motion going either up or down an incline.