The contact owns a 2013 Hyundai Elantra. The contact received notification of NHTSA Campaign Number: 23V651000 (Service Brakes, Hydraulic). The contact stated that while driving 25 MPH, the brake pedal was depressed and went to the floorboard; however, the vehicle failed to respond. The contact was able to pull over to the side of the road. The contact stated there was no warning light illuminated. The vehicle was not taken to an independent mechanic or the dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 114,606.