While driving an alarm starting beeping and "low brake fluid" flashed on the dashboard. When I went to stop in a parking lot, the brakes went all the way to the floor and the truck rolled to a stop. We immediately put brake fluid into the reservoir and it disappeared. No puddles under truck or liquid on the tires.

- Alvin, TX, USA

On 7 September 2019 we returned from a family trip of 9 days. During this time the F-150 was sitting in the garage the whole time. When we returned I went to back the truck out of the garage and when I depressed the brake pedal I had no brakes. Shortly noticing that there were no brakes the low brake fluid indicator came on. I checked the reservoir and indeed the level was really low, when it was full before we left on the trip. There were no pools or puddles of fluid anywhere. On 10 Sept, I refilled the reservoir with brake fluid. While remaining in the driveway, I pumped the brakes. The break pedal consistently went to the floor with no breaking power. After several pumps of the breaks the low fluid level indicator came back on. I checked to see the level and indeed again it was below the minimum marker. And again there is no indication of leaking anywhere. There are no pools of fluid anywhere in the engine compartment nor under the vehicle. I plan to take the truck to the dealer for repairs. The vehicle has not been in an accident due to this problem. Some motion was used to verify if the breaks were working. All of this occurred in the garage or on the driveway of the house.

- Albuquerque, NM, USA

Bought the truck a year and a half ago the engine has blown and now the brake master cylinder is went out probably be the brake booster next they should be reliable for this I'm 100 miles over my warranty and they were still on fix

- Conrona, CA, USA

Low brake fluid light came on. Was able to get to parking lot. When I went to drive the truck a few hours later it had absolutely no brakes!!! had I driven any further I would have surely crashed and died since I was on a highway. No fluid was leaking. Had to tow to dealership. Need to recall the 2016's too.

- Lakewood, CO, USA

Driving in residential type area, down hill. Break warning came on (40mph). Tried to stop but pedal went to floor. I said to my family to hold on we have no breaks and we're approaching a stoped car making a left. As they were screaming in fear I stepped on the emergency break and down shifted to first. We are lucky I knew what to do. Another family may not be so lucky. The Ford dealer said the master cylinder is leaking through. 2016 Ford F-150 3.5 ecoboost

- Schnecksville, PA, USA

Total brake failure

- Cochran, GA, USA

I was driving down the highway when my brake system alert started going off and brake alerts on dash, a minute later I went to brake and had no brakes, I was able to get off the highway and to a parking lot. I opened up the hood and there was no brake fluid, I bought more fluid and attempted to drive 3 more blocks and all the alerts went off again and no brakes, I got pulled over, checked the fluid and it was gone. There was no signs of leaks and all the fluid went into the booster and engine, causing a thick cloud of smoke I called a tow truck and it was taken to a Ford dealer. They said it was not covered because I was just over the warranty period. It is costing me over $800. I am very lucky it wasn't a bad accident. This needs to be addressed. All the fluid went into the booster and into the engine. The Ford dealer will have all the information and are repairing it now. I could add it later if needed.

- Wilsonville, OR, USA

On starting stationary vehicle received audible warning of low brake fluid. Brake pedal went all the way to the floor. Vehicle had been driven normally 2 days prior with no indication. Opened hood and observed brake fluid in reservoir below min. Added brake fluid to between min and max. Restarted vehicle and pressed brake pedal again to floor. Observed fluid level lower within reservoir, but no fluid observed coming from vehicle. Continued to add fluid, pump pedal and observe fluid draining, but no fluid leak found. Total fluid added - 36 oz. Vehicle towed to dealer. Service department concurred with self-assessment that master cylinder had failed and draining fluid was collecting in brake booster housing. Service department quoting $1000 to repair. Vehicle 37 months old, 47000 miles - just out of warranty. Had vehicle had been in motion I feel confident collision would have occurred / injuries likely. My gravest concern is that failure of major safety system did not have any precursor nor external symptoms. Hard for low age/low mileage vehicle to hold value with this issue.

- Leonardtown, MD, USA

While heading to the dentist yesterday I was driving and the low brake fluid light came on, thought maybe a sensor fault and kept driving, next the brake light indicator in the instrument cluster came on. So I pulled over and the pedal went to the floor. I barely stopped in time because there was a stop sign. I popped the hood and there was no fluid in the master cylinder. I locked the truck up and walked 3 blocks to a ace hardware to get some more fluid. I got back to the truck and checked for leaks but didn't find any. So I filled up the fluid and pumped the brakes, I had enough to get me home safely. When I got home I checked again and found the fluid to be all gone again. That was withing a 5 mile distance to where I filled it up last. I checked for leaks once again and didn't find any. So I pulled the vacuum sensor off the bottom of the brake booster and all of the brake fluid poured out. The master cylinder failed and kept pushing the brake fluid into the booster.

- Grayslake, IL, USA

On July 18, 2019 vehicle (2016 Ford F150 with 51,721 miles) driven under highway conditions experience a 'low brake fluid' warning followed afterwards with complete loss of brakes when attempting to secure the vehicle to a safe condition. Fortunately the driving situation allowed the vehicle to be secured safely. Upon inspecting the vehicle there were no indication of brake fluid loss through broken brake lines or system leakage. Subsequently transported the vehicle to the vehicle our originating Ford dealership, the shop diagnostic result was the 'failure of the master brake cylinder rear cup seal'. additional damage included the booster pump due to brake fluid contamination. Issues: This is the same failure to which Ford motor previously recalled 2013 - 2014 F150's. at 51K miles, the failure of a master cylinder is premature. During routine maintenance, inspection of the master cylinder does not readily lead to indication of potential failure or need for replacement. This failure could be catastrophic under the right conditions if proper operator control is not followed - lower speed by reducing gearing and using the emergency brakes. The replacements are oem factory parts; possibly the same manufacture as that replaced which could be potential for future failure (this could not be clarified by the Ford shop at the time of the work)! the primary concern of course potential for relapse of the same event. Secondarily is the premature expense of master brake cylinder and booster pump replacement.

- Silver City, NM, USA

Complete brake failure with limiter warning. Driving and brake fluid level light came on. Stopped at a gas station refilled brake fluid. Lost brake pressure after driving less than a mile from gas station. Refilled brake fluid. Next morning starting seeing white smoke in exhaust. All of the brake fluid drained out of brake fluid out and leaking from master cylinder

- Hamilton, GA, USA

The contact owns a 2016 Ford F-150. While driving on the interstate, the brake warning indicator illuminated. While depressing the brake pedal, the vehicle failed to stop. The contact had to apply the camper brake to reach the next exit. The contact took the vehicle to murdo Ford (219 main St, murdo, sd 57559, (605) 669-2391) where it was diagnosed that the vacuum booster sucked the seal out of the master cylinder and all the fluid went to the booster. The technician added fluid to the brake master cylinder and disconnected the booster. The contact was able to drive the vehicle and later took it to thunder basin Ford (1100 w 2nd St, gillette, wy 82716, (307) 682-4735), but was not diagnosed or repaired due to the length of time it would take for the repair. The vehicle was also taken to jackson Ford of Decatur (455 E pershing rd, Decatur, il 62526, (844) 846-7281) where a repair appointment was scheduled. The contact also took the vehicle to rick ridings Ford (1817 ridings dr, monticello, il 61856, (217) 762-2521) and was informed that there were no recalls. The manufacturer was not notified of the failure. The approximate failure mileage was 32,000.

- Decatur, IL, USA

The contact owns a 2016 Ford F-150. While driving 30 mph, the low brake fluid warning indicator illuminated and the brake pedal was depressed to the floorboard, but failed to adequately slow down the vehicle. The parking brake was activated and the vehicle slowed to a stop. A towing service was contacted; however, the vehicle was still waiting to be towed to an independent mechanic to be diagnosed. The contact stated that brake fluid was added to the brake reservoir; however, after several seconds, the brake reservoir was empty again. The vehicle was not repaired. The dealer and manufacturer were not contacted. The approximate failure mileage was 23,000.

- Anthem, AZ, USA

Upon pulling out of parking space, low brake fluid light came on and brake pedal lost all pressure. Went back into store to purchase more brake fluid. Refilled and low fluid light came back on before leaving parking lot. Drove to another lot and refilled reservoir as it was empty again. No signs of external leaks. Upon viewing other identical complaints, I believe it is leaking into brake booster, which has not yet been recalled for this model year. F150 only has 61,000 miles.

- Spring, TX, USA

While driving total loss of brakes, pedal to the floor. No fluid in master cylinder. Master cylinder failed and fluid leaked into booster and burned off in engine

- Floral Park, NY, USA

While driving on a us highway at 65 mph, I had a need to suddenly apply the brakes on my 2016 Ford F-150 and there was a sudden failure. The brake pedal had to be depressed the entire distance to the floor to finally get the vehicle to decelerate. Afterwards a warnings light came on indicating low brake fluid. Despite adding fluid to the reservoir the brakes would still not engage. The vehicle had to be brought for service where it was determined that there had been a failure in the master brake cylinder. Fortunately this did not result in an accident or injury.

- Lafayette, LA, USA

I have owned my 2016 Ford F-150 super crew lariat for almost 3 years. I purchased it brand new from a dealer in palm beach county Florida. I am on top of my routine maintenance and have just had my truck serviced 3 weeks ago. On 7/20/19 my truck's brakes completely failed while driving from my house on a residential road. I had to use my emergency brake to stop my vehicle from going through a stop sign. Thankfully, I was not involved in an accident. My master cylinder had lost all its fluid but there were no signs of leaks. I added brake fluid and I could see it leaving the reservoir. It appears to be leaking into the brake booster. I had to have my truck towed to the dealership and I'm waiting to hear back from the service department.

- Lake Worth, FL, USA

While driving to work a red brake warning light came on the display and I tried the brakes. The brake pedal went to the floor and I had no brakes. I pulled over in a safe spot checked the brake reservoir and it was completely empty. I started the vehicle and smoke started pouring out of the exhaust. Had it towed to a Ford/Lincoln dealer and they said the master cylinder and brake booster needs to be replaced $890. There is no Ford recall for 2016 F150S which is unbelievable since this is a serious safety issue. Did some research and there are multiple lawsuits for the same issue on 2013-2018 Ford F150S. I called Ford had a hard time understanding the rep and she created a case number. Called them the next day after speaking with Ford dealer and there was no case to be found. The second Ford rep made a case # cas22180343, was very helpful and the rep said Ford will make it right. This remains to be seen. Meanwhile I'm without a vehicle. I had a 2005 Toyota Tacoma and never had any type of issues. Hopefully this helps and gets Ford to recall 2016 F150S so no one gets hurt. Also had to replace all brakes, rotors and pads for $924.72 on a 50K mile vehicle is very questionable. Thank you

- Manchester, NH, USA

Vehicle operating normally until problem noted 7/13/2016. Vehicle purchased used from certified Ford dealership on 5/16/2018. Currently has approximately 44,800 miles on odometer. Vehicle has been parked overnight and upon am startup and backing up suffered complete loss of braking ability when brakes were applied. Low brake reservoir indicator light on. Visual check revealed reservoir level well below minimum mark and level with inlets for the brake lines. Refilled, pumped brakes and able to obtain moderately firm pedal. Started vehicle, let idle few moments, tested brake pedal but found soft pedal again sinks immediately to floor and reservoir light on again. Visual check shows fluid again has emptied as described above. Vehicle had not been moved. A visual trace of all brake lines shows no external leakage along length of the lines nor at any brake component. Fluid is obviously being drawn into the vacuum boost reservoir. Vehicle has not been altered in any way from date of purchase. This is an extreme safety issue with a high probability of loss or life and/or severe injury to passengers and/or collision with other vehicles or objects due to this sudden, total brake failure. This is a catastrophic failure of the master cylinder system that produces a failure of the redundant braking arrangement (I.e. separate front and rear brake systems). This appears from a quick google search of other complaints to becoming a known problem. Prompt action is urged by NHTSA to initiate a recall to correct these problem for obvious safety reasons.

- Fort Collins, CO, USA

I was driving home from work and vehicle was functioning normally. Unexpectedly the "low brake fluid" warning appeared. Approximately 1 to 2 minutes later I stepped on the brake and it went to the floor. The first time I pressed it slowed the vehicle slightly. I ipressed on the brake again and it did not register. It was terrifying and I felt fortunate to be able to make it to the side of the road without collision. This happened on a major city street moving about 40 mph.

- Salt Lake City, UT, USA