BRAKE PEDAL GOES ALL THE WAY TO THE FLOOR, VEHICLE INCREASINGLY DIFFICULT TO STOP AFTER ABS EVENT. 11/10/18-DEALER PERFORMED DIAGNOSTICS INDICATING REAR ROTORS NEED REPLACING, AUTHORIZED REPAIR. 11/10/18 AFTER REPLACING ROTORS DEALER STATES REAR CALIPER ACTION IS ERRATIC, STATES REAR CALIPERS NEED REPLACED DUE TO ERRATIC ACTION. AUTHORIZED REPAIR WITH OEM FORD PARTS, NOT AVAILABLE UNTIL 11/12/18. DEALER VEHEMENTLY DENIES HCU IS THE ISSUE EVEN AFTER I PROPOSE THIS SCENARIO. STATES NOT THE HCU 11/12/18-DEALER CALLED SAID PEDAL IS MUCH BETTER, HOWEVER, ALTHOUGH THERE ARE NO INDICATIONS OR CODES, HCU IS FAULTY, WANTS ME TO PICK UP CAR. STATES THAT PEDAL TRAVEL RETURNS, BUT MIGHT WANT TO HAVE THE HCU REPLACED. !! DEALER PREVIOUSLY STATED HCU WAS NOT THE ISSUE, THE REAR CALIPERS WERE: DUE TO ERRATIC BEHAVIOR. SERVICE TO THIS POINT TO HAVE COMPONENTS REPLACED, THAT HAVE NOT RESOLVED INITIAL COMPLAINT VEHICLE WAS PREVIOUSLY INVOLVED IN FRONTAL CRASH FROM PREVIOUS OWNER. DETAILS WERE NOT IMMEDIATELY AVAILABLE TO ME. WILL BE REQUESTING DEALER ASSISTANCE WITH PART REPLACEMENT IN THIS SCENARIO.