The ignition switch was disengaged when the van hit a bump while in motion on a highway. I was able to put it in natural and restart it but it was a very frightening ordeal. This has also happened on streets traveling 30 mph.

- New Britain, CT, USA

The contact owns a 2005 Buick Terraza. While driving at various speeds, the check engine, electronic stability control, and ABS warning indicators illuminated on the instrument panel. While attempting to brake the vehicle, the contact heard an abnormal noise and the stopping distance increased. The vehicle was taken to the dealer, but the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 20,000.

- Atwater, CA, USA

The contact owns a 2005 Buick Terraza. The contact stated that while driving 25 mph on an icy road, the vehicle stalled without warning causing the contact to crash into another vehicle. The air bags failed to deploy. A police report was filed and no injuries were reported. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 87,000.

- Hilton, NY, USA

Buick Terraza just shuts down while driving (at various speeds) or stopped without warning. Everything shuts down with display stating, "starting disabled, reduced engine power." I must try to get to the side quickly. After about 30 seconds, the van restarts and continues for a while until it does the exact same thing again.

- Manor, TX, USA