The contact was driving a 2006 Dodge Viper. The contact stated that while driving at 60 MPH, the rear differential locked, causing the rear tires to not rotate. The rear of the vehicle then skidded and crashed into a ditch, and flipped, coming to a stop 100-150 feet upside down in the ditch. The air bags failed to deploy. The contact mentioned that the rear differential was previously serviced at a dealer. The contact sustained neck and back injuries. Medical attention was later required. A police report was filed. The vehicle was towed to an unknown location. The contact stated that the vehicle was previously repaired for an air bag recall, and when asked the technician who performed the recall remedy why the air bags did not deploy, it was informed that the dealer did not have adequate software to complete the recall remedy. The manufacturer was not notified of the failure. The approximate failure mileage was 13,378.