Steering Wheel Vibrate problems of the 2012 BMW 550

The contact owns a 2012 BMW 550i. The contact stated that while driving at various speeds, the vehicle stalled without warning. The contact also stated that on various occasion, the steering wheel vibrated uncontrollably without warning when the brake pedal was depressed. The contact also stated that there was a clicking sound coming from the vehicle during the steering failure. The vehicle was not taken to be diagnosed nor repaired. A dealer was not contacted. The manufacturer was notified of the failure. The failure mileage was approximately 85,000.