The contact owns a 2011 Lexus GS460. The contact stated that while operating the vehicle, the message ‘Hydraulic Brake Sensor Fault’ remained displayed. Additionally, while depressing the brake pedal, the vehicle experienced severe shaking and vibration. The cause of the failure was not yet determined. The manufacturer and local dealer were not notified of the failure. The failure mileage was 149,000. The VIN was not available.