The contact owns a 2014 BMW 535i. The contact stated that while driving in stop-and-go traffic, she depressed the brake pedal, however crashed into the rear of the vehicle in front of her. The contact stated that all three air bags deployed; however, the front driver-side air bag failed to deploy properly. The contact stated that smoke came out from the air bag and failed to fully inflate, not protect the contact. Neither the contact nor the driver of the other vehicle sustained any injuries. A police report was filed. Due to the accident, the vehicle was towed to an independent mechanic, where the damage to the vehicle from the accident was repaired, and all air bags were replaced. The manufacturer was notified of the failure but offered no assistance. The vehicle was repaired. The failure mileage was approximately 129,000.