WHILE OPERATING THE VEHICLE ON THE HIGHWAY DURING RUSH HOUR (SLOW TRAFFIC) WE LOST ALL BRAKING POWER FROM THE VEHICLE. THANKFULLY, WE WERE ABLE TO GET OUT OF THE SITUATION WITHOUT ANY HARM, HOWEVER AT HIGHER SPEEDS WE WOULD HAVE GONE INTO A TERRIBLE ACCIDENT. THE VEHICLE WAS PART OF A RECALL FOR THE BRAKE BOOSTER IN 2014, AND WAS CHECKED BY A JEEP DEALER AT THE TIME. WHEN WE LOST BRAKING, THE BRAKE PEDAL BECAME EXTREMELY HARD, AND WE WEREN'T ABLE TO LOOSE SPEED AT ALL.