Brake Drum Wheel Cylinder problems of the 2013 Honda Pilot

The contact owns a 2013 Honda Pilot. The contact stated that the brake failed to engage at normal stopping distance and the brake pedal felt soft. When depressed, the brake pedal would travel partially to the floorboard accompanied by an abnormal vibration occurred when driving 65 mph. The failure would occur when traveling over a flat surface or when the cylinder was in third. The vehicle was taken to the dealer and a diagnostic was performed that was unable to locate a failure code for the vibration or the brake failure. The dealer loosened the engine and the transmission bolts however, the failure was not corrected. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure mileage was 3 and the current mileage was 2,400.