I was parked on surface parking lot with no cars around me, when I put the vehicle in reverse to back out of the parking space, within 2 or 3 seconds the steering wheel airbag exploded without warning. I did not hit anything backing out and there was no collision. I simply put the vehicle in reverse when the airbag exploded. The vehicle was towed to the dealership Porsche Dallas, 6107 Lemmon Ave., Dallas Texas 75209, and has been there since the incident happened on Feb. 1, 2025. All of the diagnostic data from the vehicle was sent to the engineers at Porsche Cars of North America in Atlanta. As of this date I have not been advised why the steering wheel airbag exploded. My left forearm was severely injured and I was treated in ER clinic. I have photos of the Vehicle immediately after the airbag exploded showing the Vehicle had backed up only a few feet when the airbag exploded. Also photos of my injury.