New 3 Month old vehicle with less than 5000 miles without warning had full failure of Brake Pedal Simulator Control Unit while on road. Immediately lost use of brakes and parking brake. Luckily driver was on a back road going uphill and was able to bring vehicle to a standstill. Honda will not provide answers regarding reason/cause for unit failure. They also cannot provide advice on how to respond if replacement Brake Pedal Simulator Control Unit was to fail in the future.