The contact owns a 2011 Lincoln MKX. The contact stated that while the husband was driving approximately 50 mph a 2nd vehicle crashed into the front passenger side of the vehicle. During the crash, the front driver side seat belt failed and did not secure the driver and the driver side air bag did not deploy. The driver sustained fractured sternum, chest, head, neck, and back injuries and was transported to the local hospital. A police report was filed at the scene and the vehicle was towed away. The cause of the failures was not determined. The local dealer and manufacturer were not notified of the failures. The failure mileage was 130,000.