On August 3, 2026, a 2008 Audi A6 was traveling on the George Washington Parkway in Virginia when the driver encountered a large tree branch in the roadway and swerved to avoid it. The vehicle struck a curb, became airborne, rolled, and went down an embankment before coming to rest. The driver was wearing a seat belt. The driver’s frontal airbag in the steering wheel deployed, but none of the side or curtain airbags deployed during the crash. Given the severity and multiple-impact sequence of the accident, I am reporting the non-deployment so NHTSA can evaluate whether the side and curtain airbag systems operated as designed. The vehicle sustained significant damage and was declared a total loss. It remains intact and available for inspection, and we have requested that it be preserved.The vehicle has been in the same family since it was purchased new in 2008, with two owners within the family. It had never been involved in an accident before this crash, and to our knowledge there had been no previous airbag deployments or repairs to the airbag or restraint systems. There were no airbag warning lights, messages, or other indications of a problem before the crash.Police responded to the accident, and the vehicle has been inspected by the insurance company. It has not yet been inspected by Audi or an independent engineer specifically regarding the side and curtain airbag non-deployment. I understand a rollover alone does not necessarily require these airbags to deploy. My conc