The contact owns a 2018 Honda Civic. The contact stated while her boyfriend was driving approximately at 35 MPH and approaching another vehicle, he depressed the brake pedal, but the brake pedal became soft, and the vehicle failed to respond as needed. The vehicle crashed into the rear of the other occupied vehicle. There was no warning light illuminated. The air bags deployed. There were no injuries sustained. A police report was filed. The vehicle was towed to a tow lot. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 71,000. The VIN was unavailable.