What 1,425 owners told NHTSA about the 2015 Ford F-150 Supercab

BRAKE FLUID IS LEAKING. I WAS DRIVING AND ALL OF A SUDDEN MY BRAKES WENT ALL THE WAY TO THE FLOOR AND I NEARLY LOST CONTROL OF THE VEHICLE. I ALSO GOT A NOTICE OF LOW BRAKE FLUID, SO I PUT SOME IN AND A FEW DAYS LATER IT WAS LOW AGAIN. I NOTICED THAT IT IS LEAKING OUT ONTO OTHER PARTS UNDER MY HOOD.

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHILE DRIVING 65 MPH AND ATTEMPTING TO SLOW DOWN, THE BRAKES MALFUNCTIONED AND THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD. THE CONTACT RELEASED THE ACCELERATOR PEDAL AND MERGED OVER TO THE MEDIAN OF THE ROAD. THE CONTACT PUMPED THE BRAKE PEDAL SEVERAL TIMES, BUT IT TRAVELED TO THE FLOORBOARD AGAIN. THE VEHICLE EVENTUALLY SLOWED DOWN TO A STOP. WHEN THE CONTACT TURNED OFF AND RESTARTED THE VEHICLE, THE LOW BRAKE FLUID MESSAGE APPEARED. THE CONTACT SLOWLY DROVE TO AN AUTO STORE TO PURCHASE MORE BRAKE FLUID, BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO BILL KNIGHT FORD (9607 S MEMORIAL DR, TULSA, OK 74133, (888) 464-2411) WHERE IT WAS IN THE PROCESS OF BEING DIAGNOSED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 160,000.

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AS I WAS DRIVING ON THE HIGHWAY, I GOT A WARNING ON MY DASH SAYING THE BRAKE FLUID LEVEL WAS LOW, ACCOMPANIED BY THE BRAKE LIGHT ILLUMINATING ON THE DASH. AS I WENT TO PULL OVER TO A SAFE LOCATION, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR WHEN I PRESSED THE PEDAL. AT THIS POINT I HAD NO POWER FROM MY BRAKES, HAVING TO STOP BY DOWNSHIFTING AND USING THE EMERGENCY BRAKE. UPON INSPECTION THERE WAS A VERY SMALL AMOUNT OF BRAKE FLUID IN THE RESERVOIR AND NO VISIBLE SIGNS OF A LEAK OR BROKEN BRAKE LINES. I PURCHASED BRAKE FLUID AND REFILLED THE RESERVOIR. WITHIN 2 MILES THE WARNING ILLUMINATE AGAIN WITH THE BRAKE PEDAL GOING TO THE FLOOR. I HAD TO HAVE MY TRUCK TOWED TO THE DEALERSHIP FOR REPAIRS AFTER THIS INCIDENT.

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I WAS DRIVING MY 2015 F150, TOWING A TRAILER OF AROUND 7000 LBS. ALL OF THE SUDDEN MY TRUCK SAID 'LOW BRAKE FLUID' AND THE PEDAL WENT STRAIGHT TO THE FLOOR. THIS HAPPENED ON A HIGHWAY. THIS TURNED OUT TO BE THE SAME PROBLEM THAT FORD RECALLED IN THE 13-14 MODELS. THE MASTER CYLINDER LEAKS INTO THE BRAKE BOOSTER, LEAVING NO TRACE OF LEAKING BRAKE FLUID, AND THEREFORE YOU WILL NOT KNOW UNTIL IT IS TOO LATE.

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TL* THE CONTACT OWNS A 2015 FORD F-150. THE CONTACT STATED THAT THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD DID NOT STOP THE VEHICLE IMMEDIATELY WHEN IT WAS DEPRESSED. THERE WAS NO WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, BUT THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE DEALER AND MANUFACTURER WERE NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 134,000.

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHEN THE BRAKE PEDAL WAS ENGAGED AT LOW SPEEDS AROUND 5 MPH, A METAL TO METAL RUBBING NOISE WAS HEARD AND THE STEERING WHEEL VIBRATED. THE VEHICLE WAS TAKEN TO BRIGHTON FORD (190 WEST BROMLEY LANE, BRIGHTON, CO 80601, (303) 800-3235) WHERE THEY TEST DROVE THE VEHICLE AND DUPLICATED THE FAILURE. THE DEALER STATED THAT THE NOISE WAS NORMAL AND THERE WAS NO FAILURE WITH THE BRAKES. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 26,000.

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THE FACTORY/ DEALER INSTALLED TOW BRAKE CONTROLLER DOES NOT APPLY ENOUGH BRAKE POWER TO STOP TRAILER. WHEN TOWING MY 5TH WHEEL(10000LBS)IT WORKS FINE WHEN I MANUALLY APPLY THE OVERRIDE BUTTON BUT WHEN I APPLY THE BRAKE PEDAL THE TRAILER BRAKES DON'T GET THE COMMAND TO ENGAGE WITH ENOUGH POWER TO STOP TRAILER, MY TRUCK IS DOING ALMOST ALL OF THE BRAKING. I HAVE READ ONLINE WHERE MANY FORD F 150 OWNERS ARE HAVING SIMILAR ISSUES. FORD SAYS THERE IS NOTHING WRONG. I HAVE BEEN TOWING USING THE MANUAL OVERRIDE SWITCH OR LEARNING TO SLAM ON THE BRAKES TO STOP. THE TRAILER BRAKES DO WORK ALMOST WHEN I SLAM ON THE BRAKE PEDAL. I AM SURE THAT THIS SHOULDN'T BE HAPPENING BECAUSE IT'S NOT SAFE.

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHEN THE CONTACT'S WIFE WAS DRIVING 45 MPH, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD WHEN IT WAS DEPRESSED. ALSO, THE LOW BRAKE FLUID WARNING INDICATOR ILLUMINATED. THE EMERGENCY BRAKE HAD TO BE ENGAGED TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO COURTESY FORD (6393 US-98, HATTIESBURG, MS 39402, (601) 264-5555) WHERE THE MASTER CYLINDER, BRAKE BOOSTER, AND BRAKE BOOSTER SENSOR WERE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE, BUT DID NOT ASSIST. THE FAILURE MILEAGE WAS 77,566. *PM*JB

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WIFE WAS DRIVING VEHICLE AND EXPERIENCED SUDDEN LOSE OF BRAKES , BRAKE PEDAL WENT TO FLOOR AND LOW BRAKE FLUID LEVEL LIGHT CAME ON . HAD TO USE EMERGENCY BRAKE TO BRING VEHICLE TO A STOP WITH NO PRIOR WARNING.

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ON 09/22/2019 WHILE DRIVING, ON A LOCAL CITY STREET, WHERE THE SPEED LIMITS VARY FROM 30-45 MPH, MY BRAKES BECAME COMPLETELY INEFFECTIVE WHILE DRIVING IN A 45 MPH ZONE. MY VEHICLE IS A 2015 FORD F-150 WITH 63,000 MILES. I INSPECTED THE BRAKE FLUID RESERVOIR, AND IT WAS COMPLETELY EMPTY WITH NO SIGN OF LEAKAGE ANYWHERE. I DID A QUICK SEARCH ON THIS ISSUE AND LEARNED THAT FORD HAD ISSUED A RECALL FOR THE SAME ISSUES ON THE 2013-2014 MODELS, BUT NOT 2015 AND UP, WHICH ARE NOW EXPERIENCING THE SAME SYMPTOMS. THE VEHICLE IS CURRENTLY AT A LOCAL FORD DEALERSHIP WHERE I AM FINDING IT DIFFICULT TO GET A RESOLUTION. THE DEALERSHIP HAS CONFIRMED AT THIS POINT THAT IT IS THE BRAKE MASTER CYLINDER THAT HAS LEAKED FLUID INTO THE BRAKE BOOSTER, WHICH CAUSED THE LOSS OF BRAKES, AND IS THE EXACT SAME PROBLEM AS THE RECALL FOR THE PREVIOUS YEAR MODELS. THE DEALERSHIP IS SUPPOSED TO PROVIDE ME WITH AN ESTIMATE OF THE REPAIRS, BUT HAVE YET TO DO SO AFTER A WEEK OF BEING AT THE DEALERSHIP.

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHILE DRIVING APPROXIMATELY 65 MPH, THE 'LOW BRAKE FLUID' MESSAGE SUDDENLY DISPLAYED AND THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD WHEN ATTEMPTING TO SLOW DOWN THE VEHICLE. THE VEHICLE WAS TAKEN TO LAWHORN FORD (2434 LAKEWAY DR, RUSSELL SPRINGS, KY) WHERE IT WAS DIAGNOSED THAT THE BRAKE SEAL HAD RUPTURED AND THE MASTER CYLINDER AND BRAKE BOOSTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000. JFT*PM MANUFACTURER STATED THAT THEY COULD NOT PROVIDE ASSISTANCE BECAUSE THERE WERE NO RECALLS FOR THE VEHICLE. *DL

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I HAVE EXPERIENCE A BRAKE FAILURE DURING THE OPERATION OF MY VEHICLE, SIMILAR TO THE DESCRIPTION WITHIN THE FINDINGS FOR FORD 16S24 ' BRAKE MASTER CYLINDER REPLACEMENT ' 2013-2014 FORD F-150 ON MY 2015 FORD F-150 WITH THE SAME MOTOR. I HAVE HAD A NON-FORD MECHANIC TAKE A LOOK AND FOUND THE SAME CONDITION DESCRIBED IS WHAT HAPPENED TO MY VEHICLE, AS WELL AS HAVE THE VEHICLE NOW BEING INVESTIGATED BY AN AUTHORIZED FORD MECHANIC. I WOULD LIKE TO ENSURE THAT THE SCOPE OF THE INVESTIGATION INCLUDE EXPANSION TO 2015 VEHICLES BUILT IN THE SAME MANUFACTURING LOCATIONS, AS I BELIEVE MY SAME SITUATION AND RISK EXIST FOR MINE. FOR REFERENCE OS THE SITUATION, I HAVE ADDED THE LINK TO THE ISSUE WRITE UP. HTTPS://STATIC.NHTSA.GOV/ODI/RCL/2016/RCMN-16V345-1450.PDF

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STARTED THE VEHICLE AND IMMEDIATELY RECEIVED AN ERROR MESSAGE STATING THE BRAKE FLUID RESERVOIR HAD LOW FLUID. THE BRAKE WARNING LIGHT WAS ALSO ACTIVATED. WHEN THE BRAKE PEDAL WAS DEPRESSED IT WENT ALL THE WALL TO THE FLOOR. REFILLED THE RESERVOIR AND RESTARTED THE VEHICLE. MOVED THE VEHICLE AND PRESSED THE BRAKE PEDAL, WHICH WENT TO THE FLOOR. RECEIVED ANOTHER BRAKE ACTIVATED AND LOW BRAKE FLUID WARNINGS AGAIN. I HAVE HAD THE VEHICLE TOWED TO BEECHMONT FORD, CINCINNATI, OH FOR DIAGNOSIS AND REPAIR. AWAITING THEIR FINDINGS.

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DRIVING, I RECEIVED A LOW BRAKE FLUID WARNING. THE NEXT BRAKING EVENT I LOST ALL BRAKE CONTROLS. I WAS NOT ABLE TO STOP. ALL TRAFFIC LIGHTS WERE GREEN AND WAS ABLE TO USE THE EMERGENCY BRAKE TO COME TO A COMPLETE STOP IN MY DRIVEWAY. ALMOST CAUSED TWO INCIDENTS BUT WAS ABLE TO SWERVE

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHILE DRIVING APPROXIMATELY 35 MPH, THE BRAKES SEIZED AND DID NOT STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO RED MCCOMBS FORD (833-504-1993, LOCATED AT 8333 W I-10, SAN ANTONIO, TX 78230) WHERE IT WAS DETERMINED THAT THERE WAS NO RECALL. THE VEHICLE WAS LEFT WITH THE DEALER FOR DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 74,000.

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COMPLETE BRAKE FAILURE. WHILE MY 15 YEAR OLD SON WAS DRIVING WITH HIS LEARNERS PERMIT, WE WERE EXITING A HIGHWAY. THE WEATHER WAS CLEAR AND DRY. AS HE WAS SLOWING DOWN THE VEHICLE ON A 65MPH HWY OFF RAMP, AT APPROXAMATLY 35-40 MPH THE LOW BRAKE FLUID LIGHT CAME ON AND THE BRAKE PEDAL WENT SOFT AND ALMOST TO THE FLOOR. HE WASN'T ABLE COME TO COMPLETE STOP. WE MADE A RIGHT TURN ROLLING ONTO THE CROSS STREET AND AN ONCOMING VEHICLE HAD TO SLAM ON THEIR BRAKES TO AVOID US. I THEN TOOK OVER THE DRIVING TO GET THE VEHICLE HOME. IT WAS CLEAR THERE WERE NO POWER BRAKES AND THE BRAKE PEDAL WAS SOFT, TAKING MUTCH MORE DISTANCE TO DEPRESS THE PEDAL. ONCE WE WERE HOME I ADDED BRAKE FLUID AGAIN AND AGAIN TOTALING TWO QUARTS OF FLUID. THE FLUID WOULD ONLY LAST IN THE RESERVIOR FOR SEVERAL MINUTES THEN IT WOULD DRAIN DOWN. THERE WERE NO SIGNS OF FLUID LEAKING ANYWHERE ALONG THE ENTIRE BRAKE SYSTEM. THE VEHICLE IS NOW UNDRIVABLE. MY ASUMPTION IS THAT THE FLUID IS LEAKING INTO THE BRAKE BOOSTER. THE VEHICLE IS IN TRANSIT TO THE DEALER FOR DIAGNOSTICS.

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I WOULD LIKE TO SHARE MY WIFE'S STORY ON WHAT HAPPENED WHILE DRIVING MY 2015 F-150 3.5L ECOBOOST LAST THURSDAY 9/5/2019. AROUND 5:30PM MY CELL PHONE RINGS AND THE ID SHOWS THAT IT IS MY WIFE CALLING ME. I FIGURED SHE WAS CALLING ME TO TALK ABOUT HER DAY OR WHAT I WAS MAKING FOR DINNER BUT SHE WAS REALLY CALLING ME TO TELL ME MY TRUCK'S BRAKE AND FLUID LIGHT SENSOR CAME ON. SHE WAS WORRIED ABOUT DRIVING THE TRUCK ANY FURTHER AS SHE WAS COMING DOWN THE HIGHWAY. I TOLD HER THAT I WOULD GOOGLE TO SEE IF ANYONE ELSE WAS HAVING THIS ISSUE AND THAT I WOULD CALL HER RIGHT BACK. I QUICKLY SEARCHED 2015 F-150 BRAKE AND FLUID LIGHT SENSOR AND INSTANTLY FOUND SEVERAL POSTS ABOUT PEOPLE HAVING THIS ISSUE. AFTER READING A COUPLE VERY QUICKLY, MOST PEOPLE SAID THAT THEY LOST THEIR BRAKES INSTANTLY OR WITH IN MINUTES. I WAS WORRIED SO I QUICKLY CALLED HER BACK AND CALMLY ASKED HER IF SHE COULD GET OFF THE HIGHWAY OR PULL OFF ASAP. I THEN PROCEEDED TO TELL HER THAT SHE MIGHT LOSE THE BRAKES IN THE TRUCK. I TOLD HER TO CALL ME IF THE VEHICLE BECAME WORSE. AT THAT TIME SHE WAS CLOSE TO THE EXIT. AS SHE WAS APPROACHING THE OFF RAMP THE BRAKE PEDAL PUSHED ALMOST TO THE FLOOR. SHE PRESSED THE PEDAL AGAIN BEFORE GETTING TO THE YIELD SIGN AND REALIZED THAT SHE WAS LOSING THE BRAKES. LUCKILY THE TRAFFIC WAS NOT HEAVY IN THE ONCOMING TRAFFIC AND ALLOWED HER TO RUN THE YIELD SIGN WITHOUT HAVING THE ABILITY TO STOP IF NEEDED. SHE GOT IT STOPED. SHE THEN CALLED ME AGAIN TO TELL ME THAT THE TRUCK LOST ITS BRAKES AND THAT IT WAS UNABLE TO BE DRIVEN. AT THIS TIME THE BRAKE PEDAL WENT TO THE FLOOR EVERY TIME SHE PRESSED IT. WHEN I ARRIVED AT HER LOCATION THE BRAKE FLUID WAS ABOUT EMPTY. I REFILLED IT AND PRESSED THE BRAKES A FEW TIMES. WE HAD IT TOWED TO A FORD DEALERSHIP. FORD FOUND THAT THE MASTER CYLINDER FAILED. I'M STILL WAITING FOR THEM TO GET THE REPLACEMENT PART IN.

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I DEPRESSED BRAKE PEDAL TO START TRUCK. ONCE TRUCK STARTED THE PEDAL WENT ALL THE WAY TO THE FLOOR AND THE BRAKE WARNING LIGHT ON THE DASH ILLUMINATED. TRIED MOVING THE TRUCK A COUPLE FEET TO SEE IF I HAD BRAKES, AND THE TRUCK DID NOT STOP WHEN THE PEDAL WAS DEPRESSED. USED THE EMERGENCY BRAKE TO STOP. CHECKED THE MASTER CYLINDER, IT WAS EMPTY. I ADDED ABOUT 10 OZ. OF BRAKE FLUID, PUMPED UP THE BRAKES AND IT WORKED. DROVE ABOUT 8 MINUTES TO WORK, BRAKES OK. I RETURNED TO THE TRUCK AFTER WORK, ABOUT 10 HOURS AND THE PEDAL WENT TO THE FLOOR AGAIN AND NO BRAKES. I FILLED MASTER CYLINDER AGAIN AND WAS ABLE TO DRIVE HOME. I DROVE VERY SLOWLY AND CAREFULLY BECAUSE I EXPECTED TO BRAKES TO FAIL AT ANY TIME. I LIVE 5 MILES FROM WORK. IF IT WAS ANY MORE I WOULD HAVE HAD THE TRUCK TOWED. I WILL HAVE IT TOWED TO THE DEALER IN THE MORNING.

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BRAKE FAILURE DUE TO BRAKE FLUID LEAKING THROUGH MASTER CYLINDER AND BEING SUCKED INTO THE EXHAUST. THE FLUID IS SUCKED OUT OF THE BRAKE SYSTEM THROUGH A VACUUM LINE IN THE MASTER CYLINDER AND BOOSTER WHICH LOWERS THE FLUID LEVEL AND LETS AIR INTO THE BRAKE LINES. THE BRAKE FLUID IS THEN BURNED IN THE EXHAUST AND CREATES WHITE SMOKE FROM THE EXHAUST PIPE. THE "LOW BRAKE FLUID" LIGHT CAME ON WHILE DRIVING ON A MAIN CITY ROAD AND THE BRAKES WENT OUT IMMEDIATELY AFTER. THE VEHICLE WOULD STOP ONLY IF THE BRAKE PEDAL WAS COMPRESSED ALL THE WAY TO THE FLOOR. ON SEVERAL OCCASIONS THE EMERGENCY BRAKE HAD TO BE USED TO BRING THE VEHICLE TO A COMPLETE STOP. AFTER THE "LOW BRAKE FLUID" LIGHT CAME ON, MORE BRAKE FLUID (32 OZ) WAS ADDED BUT IT WAS IMMEDIATELY SUCKED THROUGH THE MASTER CYLINDER AND INTO THE EXHAUST AND THE PROBLEM PERSISTED. I SCHEDULED AN APPOINTMENT TO HAVE A LOCAL FORD DEALERSHIP FLUSH THE BRAKE SYSTEM AS I ASSUMED THERE WAS AIR IN THE LINES DUE TO THE LOW FLUID LEVEL. AFTER THE DEALERSHIP FLUSHED THE BRAKE AND REPLACED ALL FLUID THE VEHICLE STILL HAD NO BRAKES. THIS IS WHEN THE PROBLEM WITH THE MASTER CYLINDER WAS DISCOVERED.

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TL* THE CONTACT OWNS A 2015 FORD F-150. WHILE ATTEMPTING TO STOP THE VEHICLE, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD WHEN IT WAS DEPRESSED. THE FAILURE CAUSED THE CONTACT'S FOOT TO DEPRESS THE ACCELERATOR PEDAL SIMULTANEOUSLY. THE CONTACT STATED THAT THE FAILURE OCCURRED MANY TIMES AND IT WAS DIFFICULT TO DEPRESS THE BRAKE PEDAL WITHOUT ALSO DEPRESSING THE ACCELERATOR PEDAL. THE CONTACT DROVE TO GERMAIN FORD (2356 HELLER DR, BEAVERCREEK, OH 45434, (937) 429-1300) WHERE IT WAS DETERMINED THAT THE ISSUE WAS NORMAL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 50,200. THE VIN WAS UNKNOWN.

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MY TRUCK WAS BEING REPAIRED FOR LIGHT FRONT END DEER HIT. THE TECHNICIAN WAS BACKING MY TRUCK INTO THE CLEANUP BAY AND THE BRAKES FAILED COMPLETELY. ANOTHER TECH HAD TO MANUALLY STOP THE TRUCK FROM ROLLING. I CONTACTED MY DEALER AND WAS TOLD THAT THEIR IS NO RECALL FIR THIS YEAR AND I WAS STUCK PAYING THE BILL. 40 YEAR FORD GUY SERIOUSLY LOOKING INTO DODGE. I CAN'T HAVE THE SAFETY OF MY FAMILY JEOPARDIZED.

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SITTING AT A STOP SIGN AND "LOW BRAKE FLUID" LIGHT CAME ON. DROVE LESS THAN A MILE HOME READY TO USE THE EBRAKE AFTER NOTICING THE BRAKE WENT ALL THE WAY TO THE FLOOR BEFORE STOPPING, SO DIDN'T KNOW HOW MUCH WAS LEFT. THE BRAKE FLUID WAS VERY LOW. ADDED BRAKE FLUID, DROVE IT AROUND THE BLOCK AND AS I WAS PULLING INTO THE DRIVEWAY, THE "LOW BRAKE FLUID" LIGHT CAME ON AGAIN. TURNS OUT, IT'S THE MASTER CYLINDER LEAKING ALL THE FLUID INTO THE BRAKE BOOSTER, WHICH APPARENTLY IS A KNOWN ISSUE THAT FORD IS OK WITH? THEY RECALLED THE 2013 AND 2014S, BUT 2015S AND 2016S ARE HAVING THE SAME PROBLEM. SHAME.

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WHILE DRIVING TO WORK YESTERDAY MORNING ON THE FREEWAY MY "LOW BRAKE FLUID" WARNING CAME ON. AS I TRIED TO STOP AFTER EXITING THE FREEWAY, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR WITH WHAT FELT LIKE WAS NO PRESSURE. ONLY AFTER FULLY SEATING THE PEDAL TO THE FLOOR WAS I ABLE TO GET THE BRAKES TO GRAB AND GET STOPPED. LUCKILY IT WAS EARLY MORNING AND TRAFFIC WAS MINIMAL. WHEN I CHECKED MY BRAKE FLUID IT WAS WELL BELOW THE MINIMUM LEVEL MARK. USING ANOTHER VEHICLE AT WORK, I WENT AND BOUGHT A SMALL BOTTLE OF FLUID AND PUT THE ENTIRE THING INTO THE RESERVOIR, BRINGING UP TO ABOUT HALF WAY BETWEEN MIN AND MAX. OVER THE NEXT 10 MINUTES WE WATCHED THE LEVEL SLOWLY DROP DOWN BELOW THE MIN LINE AND BEYOND. I DROVE BACK TO THE STORE AND BOUGHT A LARGE BOTTLE OF FLUID, HAVING DECIDED I WAS GOING TO TAKE THE TRUCK TO THE DEALERSHIP. I FILLED THE RESERVOIR TO THE MAX LINE AND SET OUT AT A SLOW SPEED USING SIDE STREETS. I HADN'T WENT 2 MILES WHEN THE "LOW BRAKE FLUID" LIGHT CAME ON AGAIN. I CHECKED THE LEVEL, AGAIN DOWN BELOW MIN, AND I AGAIN REFILLED THE RESERVOIR, USING THE REST OF THE BOTTLE, AND CONTINUED ON....ONCE AGAIN WITHIN 2 MILES THE LIGHT RETURNED. I NEVER REALLY HAD BRAKE PRESSURE THROUGHOUT THIS TIME. NEVER ONCE DID I FIND EVIDENCE OF A LEAK. TODAY THE DEALERSHIP CALLED AND TOLD ME MY MASTER CYLINDER AND BRAKE BOOSTER BOTH NEED REPLACED, AND THE FLUID WAS BUILDING INSIDE THE BOOSTER, HENCE NO PUDDLE. MY TRUCK IS ONLY 4 YEARS OLD, WITH LESS THAN 54,000 MILES ON IT SO IT SEEMS EARLY IN ITS LIFE TO HAVE THIS SYSTEM FAIL SUDDENLY. AFTER DOING SOME RESEARCH ONLINE, INCLUDING THIS SITE, I'VE SEEN THAT THIS ISN'T QUITE AS UNCOMMON AS I ORIGINALLY THOUGHT IT WOULD BE. THERE SEEMS TO HAVE BEEN MANY INSTANCES OF THIS YEAR/MAKE/MODEL OF TRUCK LOSING ITS BRAKE SYSTEM AROUND THE SAME MILEAGE OR EARLIER.

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THE VEHICLE WAS IN MOTION GOING ABOUT 5 MPH WHEN THE BRAKES FAILED WHEN I WAS TURNING INTO A PARKING SPOT AT THE PHARMACY ON 8/17/19. I HAD TO USE THE PARKING BRAKE TO COMPLETELY STOP WHEN PARKING THE TRUCK AND THEN ONCE STOPPED THE LOW BRAKE FLUID WARNING CAME ON. THEN I DROVE TO AN AUTO PART STORE THAT WAS A 1/4 OF A MILE DOWN THE ROAD AND PUT MORE BRAKE FLUID IN AND DROVE HOME, BUT ONCE I WAS HOME THE BRAKE FLUID TANK WAS EMPTY. I PUT MORE IN AND FOUND A PUDDLE OF BRAKE FLUID COMING OUT OF THE FRONT PASSENGER SIDE OF THE TRUCK. THE TRUCK IS CURRENTLY IN THE SHOP AND THEY STATED THE MASTER BRAKE CYLINDER AND BRAKE BOOSTER FAILED.

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WHILE DRIVING IN DOWNTOWN TRAFFIC ON A CITY STREET, THE LOW BRAKE FLUID INDICATOR CAME ON AS WELL AS THE BRAKE WARNING LIGHT. THE BRAKE PEDAL WENT NEARLY TO THE FLOOR AND BRAKING ABILITY WAS SEVERELY DIMINISHED. I HAPPENED TO BE CLOSE TO AN AUTO PARTS STORE SO I FILLED UP THE FLUID RESERVOIR WITH APPROXIMATELY 24 OZ. OF BRAKE FLUID. WITHIN ABOUT 3 MILES THE LIGHTS CAME ON AND BRAKES FAILED AGAIN. MY WIFE BROUGHT MORE BRAKE FLUID TO ME AND I ADDED APPROXIMATELY 24 OZ. MORE. I BARELY MADE IT HOME, ANOTHER 5 MILES, AS THE BRAKES WERE FAILING AND THE RESERVOIR WAS EMPTY AGAIN. THERE IS NO SIGN OF A LEAK. AFTER CHECKING ONLINE AND DISCUSSING WITH A FORD SERVICE REPRESENTATIVE, THIS APPEARS TO BE A COMMON DEFECT WHERE A SEAL IN THE MASTER CYLINDER HAS FAILED AND THE BRAKE FLUID IS BEING SUCKED INTO THE BRAKE BOOSTER.

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