Complete brake failure occurred without warning except for a period of seconds during which "low brake fluid" warning light appeared. Vehicle was operating normally at all times prior to event. 38,111 miles on vehicle. Approx. 4 mile drive to highway, brakes working normally. While traveling 70mph (the legal limit there), warning light appeared. I immediately tapped brakes and found that pedal went all the way to floor. Managed to get to shoulder without accident. Drove gingerly to service station to examine. No leakage at calipers, on rotors or from any brake lines. Brake fluid reservoir empty. Had been full previously and vehicle well maintained. I filled reservoir with dot appropriate brake fluid, no change in braking ability. With pumping of pedal, no effect. With pedal all the way to floor, vehicle exhibited extremely attenuated braking (took well over 30 feet to slow from 10 mph to zero). Truck to Ford service department/bay. They told me that "we see one of these about every week" which I found shocking. They rapidly diagnosed problem as master cylinder failure with bleed of fluid into booster system (which is why no pressure, but no leakage of fluid externally). They replaced the master cylinder and the booster. This is a very dangerous problem. Fortunately, I did not injure or kill anyone when brakes failed at highway speed.

- Temple, TX, USA

Being the driver of a 2016 F-150 crew cab 4X4 with 3.5 eco boost motor. I have been now been involved in two brake failure related collisions. One on June 20, 2017 and the other this year on July 3rd. The first brake related collision was on June 20th, 2017. I was stopped at a traffic light behind some other cars waiting on light to change. Next thing I know I feel a slight bump hitting the car in front of me so I go to hit the brake again and inadvertently hit the accelerator ending up pushing the car in front of me into the car in front of it. Which caused a 3 vehicle accident that day. Now this July 3rd I was involved in a much serious accident due to brake failure. I was driving in far left lane approaching a traffic light that was red and cars in front of me stopped ahead. I went to hit my brakes to stop and the truck kept on get going in a forward motion without any indication the brakes were working. I tried to direct truck to the left side median to avoid a collision and while in forward motion I made impact with the car in middle pushing it into the first car up front that was involved in my second accident. My truck's middle and right front made contact with car in front of me hard enough to puncture gas tank on the left side of that car with my front mounted trailer hitch and push it into the 1st car's rear end. My drivers side steering wheel air bag deployed hitting me in the stomach area and seat belt faster on drivers side bruised my right hip, and neck ended up with some muscle strain as well. The driver of the most forward car went to the hospital with unknown injuries while I was tending to the local authorities investigation and my truck. The driver in middle car, the car I struck I know that their car was totaled with severe damage to both front and rear damage. Weather clear and roads dry. There was no trace of skid marks on the road.

- Sorrento, FL, USA

100% brake failure at highway speed. Ford recalled previous model years for the same issue but failed to inform owners of later years that had the same parts installed. My truck was serviced at the Ford dealer I bought it from 100 miles before failure. Ford should be urged to recall and reimburse.

- Plantation, FL, USA

I drove my truck to my farm without incident. After being parked for a while, my son-in-law got in to drive to a work area and immediately reported the brake pedal went to the floor. We checked the brake fluid level and it was almost empty, even though I had recently had the level checked as "full" at a change of oil and filter. It took two large bottles of brake fluid (at over $8 each, just to get it home (about 50 miles). I had to pump the brakes during this trip to get braking action and drive very carefully and slowly. The day before this happened I had towed a single axle trailer with an agricultural disc on it. Had this quick loss of brakes occurred at that time, it likely would have resulted in serious injury, property damage, and even death. The shop where I took it replaced the master cylinder, the power booster, which had filled with fluid, and an O2 sensor, which had been damaged. The total cost was $1194.34. Since all the parts were replaced with new Ford brand parts, there is a likelihood that it will happen again. This is a real safety issue and merits a recall, as well as reimbursement to me of my expenses.

- Fate, TX, USA

I am emailing you to both alert you of a situation and ask that you reach out to my father regarding what happened to him this morning. He owns a 2016 or 2017 F-150 with the 3.5 eco-boost. This morning as he was driving between 50 ' 60 mph South on hwy 111 in coming into livingston tn. He let of the gas preparing to veer right on the 111 bypass, his brake warning light came on and when he attempted to apply the brakes his foot went to the floor and the was absolutely zero there for him to stop the truck. Luckily this happened about 6 am and there was no one on the road and it was in a place that he had room and time to shift down and decrease his speed and pull over. One mile further and this could have had a very different ending. He was on his way to pick up a boat.. so this was three hours later this could have had an extremely different ending. Did I mention he 81 years old. There was little to no warning, the light came on just as he was getting ready to make his turn. This could have turned out very bad.

- Byrdstown, TN, USA

The brake fluid reservoir drains to empty and you loose brakes but there is no apparent leak in the engine compartment, under the truck, on the wheels, or at the brakes. Refilled reservoir and did not drive and reservoir and 3 days later it was empty again.

- North Bend, WA, USA

The contact owns a 2016 Ford F-150. The contact stated that the brake warning indicator illuminated "low fluid" and the emergency brake indicator also illuminated when the failure occurred. While operating the vehicle, the contact depressed the brake pedal and it travelled to the floorboard. The dealer (henry curtis Ford, 1120 auto center dr, petaluma, ca 94952, (707) 769-2310) indicated that the brake master cylinder and the brake reservoir may need to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 26,000.

- Peteluma, CA, USA

My 2016 Ford F150 limited is 2 years old. The brakes started not working well and then the brake fluid light came on. I took it to the dealership and they told me the master brake cylinder was leaking and had to be replaced. I had to pay for this even though there is a recall for this same issue on other model year F150S.

- Fort Worth, TX, USA

Complete brake failure with no warnings

- Log Cabin, TX, USA

On 7/16/18 at approximately 0400, while on rt 95 S driving at approximately 68 mph, in stamford ct, I applied brakes and brakes failed. Using downshift and E brake I successfully slowed down and took the nearest exit ramp. Brought the vehicle to the nearest Ford dealer. Its reported that the master cylinder failed. Looking on-line there is an apparent issue the 2015, 2016 V6 eco boost models where this failure has occurred. Ford is currently evaluating whether to cover the repairs. This notification is for record purposes as on-line it appears that NHTSA is investigating these failures.

- Tolland, CT, USA

2016 F150 truck, 24,000 miles. While applying the brakes, the truck will stop but the pedal continues until it hits the floor. The brake pads are good, brake fluid is full. I am taking the vehicle to a dealership on 7-18-18. Very unsettling to have a new truck and the brake pedal doesn't work correctly.

- Strafford, MO, USA

Driving down 7hwy in leavenworth county Kansas. Pushed brake pedal down and low brake fluid light came on and brake pedal went to the floor. Stopped a friends house and got brake fluid and it all got sucked into the brake booster. Took it to the local Ford dealer and had the master cylinder and brake booster replaced.

- Easton, KS, USA

Drove the truck for about 2.5 miles with no issues and parked. As I backed out of parking the truck lost all braking capability. I was able to stop the vehicle using the transmission. The truck alerted me with a brake fluid light and the emergency brake light. No visible leaks under the hood, calipers, frame, engine compartment. Towed to dealer... the truck has 28,100 miles. Platinum 3.5 eco boost!

- Altus, OK, USA

Sudden and complete loss of braking ability. Driving 50mph. Truck alerted to "low brake fluid." About 45 seconds later, I had no ability to brake other than the emergency brake.

- Grand Isle, VT, USA

I was driving and about half way to work I received a low brake fluid warning and then tried to brake and instantly had no braking power. How to slow down and attempt to pump the brakes to come to a stop. Lucky I was on a fairly open stretch of highway without much traffic or stops.

- Pinehurst, NC, USA

Brakes went to the floor all of a sudden. I got a brake fluid low warning on the dashboard. Truck is regularly serviced but after doing a little research I found that there were a lot of people experiencing what I have going on. I do not feel safe driving my kids in my truck rendering it useless. Truck was stationary at the time of incident.

- Shingle Springs, CA, USA

On 6/2/18, after a night's stay in a walmart parking lot in our 5th wheel, our 2016 Ford 150 pickup showed a low brake fluid warning light when I started the truck to leave. I put in dot 4 brake fluid and the light went out so we left. We had traveled only a few miles North on interstate 95 in South caroilina when the brake warning light light came on. When I pushed on the brake pedal, it went down to the floor with no braking. Although we were in heavy traffic and going 55-60 mph, I put on my hazard lights and was able to downshift to about 5-10 mph. Then with brake pedal down to floor, I was able to slowly stop our pickup and trailing 5th wheel. We were extremely fortunate that the traffic conditions did require emergency braking. We were also fortunate that we were only 10 miles from a Ford dealership that determibed that the truck's master brake cylinder and booster were bad and needed to be replaced. Our trip was delayed two days due to this issue and cost us over $750 dollars in repairs and lodging. This happened only 98 miles past my warranty period! when doing some research, I see that Ford recalled its 2014 and 2015 F150's for the very same problems. It sure seems like some ( if not all) 2016S are having the very same problem. But by the grace of god, we could have been in a serious accident and hurt or killed. I am very nervous now driving this truck and my trust in Ford products has been seriously damaged. I urge other 2016 - new 150 owners to be watching the brake fluid levels closely.

- Tavares, FL, USA

While driving my vehicle the low brake fluid light came on as I was pulling into a parking spot. I parked the vehicle and checked the brake fluid, it was well below the minimum level. Since it stopped ok, I thought when I left I could just drive to a store and buy brake fluid. When I got in the truck 30 minutes later and started it the brake pedal went all the way to the floor. Putting in drive I found that there were no brakes at all and used the foot emergency brake to stop the truck. I got a ride to a car parts store where I bought 32 oz. Bottle of brake fluid. I poured more than half the bottle into the reservoir getting it up to the max line, started the vehicle, pumped the brakes and got brake pressure back. I drove back to my campsite which was 1.5 miles away. Halfway there the low brake fluid indicator came on again. By the time I arrived after 1.5 miles, the brakes were almost useless and there was very little pressure under the pedal. I parked the truck and check the fluid, again it was well below minimum and I could hear what sounded like a vacuum leak. I filled the reservoir up to almost max again, pumped the brakes, got pressures back and looked for any leaks under the truck and found none. I pulled the truck back and forth, about a 100 feet, repeatedly to see if I could see a leak - nothing, but the level in the reservoir was going down. I drove the truck in around a 1/4 mile circle and by the end the brake peddle had lost most of it's pressure, still no leaks under the truck. When it got towed the next day there was no stopping power at all. I was fortunate that this did not happen on a highway or more high speed road or I would have been in a very dangerous situation. I'm submitting this complaint because I have seen that there is an investigation of brake failure on some years of these trucks.

- Marlborough, MA, USA

When driving the vehicle on freeways with adaptive cruise control enabled, if the vehicle approaches a vehicle in an adjacent lane (typically a larger vehicle like a truck with a trailer, semi, or tanker) the collision aid activates and heavily applies the brakes. If someone is following close behind me, as has happened in at least 4 instances, the individual will need to stop and make an emergency maneuver to avoid colliding. In both cases, the braking only lasted momentarily but was enough to reduce the vehicles speed 20-30 mph during that time. The vehicle has been inspected by Ford but they have said that there is nothing that they can do. For the time being, we keep this feature disabled until Ford can get this issue resolved. There have been recalls for previous years but ours is not included. Because of this Ford has said there's nothing they can do on multiple attempts to get the problem resolved.

- Maple Lake, MN, USA

This morning 5/16/2018 at 7:30 am cdt, while taking my 6 year old son to school, my 2016 Ford F-150 produced a "brake fluid low" warning light. The braking system was severely compromised and the pedal had to be depressed to the floor to stop the vehicle. I added 54 oz of brake fluid to get it to a dealership and the warning light continued to appear. As I was driving I had to go into manual mode to downshift to slow the car down so I could brake vehicle to a stop. Full speed braking was impossible. Was able to get to a Ford dealer - they determined that the master cylinder was leaking and that the master cylinder and brake booster have to be replaced. This is consistent with prior model year recalls for this truck and engine type (3.5L V6 ecoboost). Vehicle has 45K miles and out of warranty for this issue, so out of pocket costs are roughly $1100. Service records will become available tomorrow when the work is complete. I can upload them at that time.

- Fort Worth, TX, USA