I started a drive, I got one half mile into the drive and the chimes went off on the dash stating low brake fluid. I tested the brakes to see if they were responsive. They were normal from my experience. I drove another five miles and had to slow for a highway overpass turn. The brakes went to the floor. I had a slight bit of brake but almost non existent. I limped the truck home and carefully put it into neutral gear any time I approached a stop light or stop sign. Got it to my garage. Checked brake fluid, totally empty. Checked all four corners and found no fluid. Poured new fluid in and check brakes again. They started to firm and went limp again. Checked for leaks again. Found the master cylinder making a hissing noise and fluid dripping from the master cylinder reservoir. Will have the dealer tow tomorrow.

- Cypress, TX, USA

Drove an hour away to attend a concert Friday night, no issue at all until it was time to leave. The truck had a low brake fluid light and the brake peddle goes straight to the floorboard. After filling with fluid I do not see a leak but there is none left in the reservoir. It seems this is a common and dangerous problem that is going to kill someone! of course my truck just went over 36,000 miles for a warranty service (less than 37,000 currently) and I may be stuck repairing a defect that could have killed

- Sarasota, FL, USA

Complete loss of brakes due to loss of brake fluid leaking from master cylinder

- Murrieta, CA, USA

After towing my travel trailer 90 miles to a campground, I left my truck parked for about 2 days at the campground. When preparing to go home, I turned on the vehicle and was immediately notified by the instrument panel of low brake fluid. Brake pedal would press all the way to the floor with minimal resistance and no braking power. I checked the reservoir and found that there was minimal fluid. I looked for any leaks of brake fluid throughout the engine compartment and all the way back to each wheel. No leak was found. I added 1 bottle (12 oz) of brake fluid to get the level in the reservoir back into range. The vehicle then operated normally and I was able to tow my trailer 90 miles back home. Had the vehicle been in operation when this happened, the results would have been catastrophic - especially while towing.

- Turlock, CA, USA

As I was driving on a city street, the light on the cluster came on telling me that the brake fluid was low in the master cylinder. I verified it by checking the fluid. I went to an auto parts store and wound up putting three 12oz cans of brake fluid and the brakes were still marginally working. I drove it to the local Ford dealer where 2 days later I was informed the master cyl. Had leaked fluid to the booster. The dealer wound up replacing the master cyl., brake booster with sensor, spark plugs, brake switch, vacuum line ck valve, and vacuum pump.

- Tracy, CA, USA

Driving vehicle. Stopped at stop sign. Noticed brake warning lamp on. Within 3 stops pedal went to floor. Checked reservoir and found fluid was completely empty. Checked vehicle for leaks. Found no external leaks. After towed home, removed master cylinder. Found brake booster full of brake fluid.

- Clinton, UT, USA

While driving on 7/27/2017 around 9:00 am, a warning light came on that said low brake fluid. 5-10 minutes later when I went to slow down to take an on ramp, the brake pedal went to the floor. I had barely enough braking to slow the vehicle, and to find a safe place to leave the road. I had to be towed to my local Ford dealership.

- Lancaster, SC, USA

The contact owns a 2015 Ford F-150. While driving approximately 60 mph, a "brake fluid low" message displayed on the instrument panel. The contact slowed down and proceeded to the next exit before losing all braking ability. The contact downshifted and applied the emergency brake in order to stop the vehicle. The vehicle was taken to purvis Ford of fredericksburg, Virginia where it was diagnosed that the master cylinder failed, which caused brake fluid to leak into the brake booster. Both the master cylinder and brake booster needed replacement. The vehicle was repaired. The manufacturer was not contacted. The approximate failure mileage was 71,000.

- Havelock, NC, USA

I was driving South on I-75 just North of cincinnati, oh at approximately 65 mph when a message came on dash and said something like "low of brake fluid". I tested my brakes and the brake pedal went to the floor. Traffic had simultaneously begun to slow so I down shifted the transmission, swerved from the slow lane to the shoulder and applied the emergency brake. I was able to get the truck to a complete stop. I lifted the hood and found no brake fluid. I called and waited for a tow truck. After two hours, since I had only driven 2 miles from my house I asked my son to bring me a quart of brake fluid and check the driveway to see if there was a spot on the concrete. There was no spot on concrete, I added an entire quart of fluid but still had no brakes. Had truck brought to kerry Ford and repaired where they advised the brake master cylinder failed. Although the vehicle was only 18 mos old, the warranty was only 36,000 miles which I had passed. I bought the vehicle brand new. I paid for the repair but could not get the master cylinder from the dealer as I was told Ford required the old one for a core.

- West Chester, OH, USA

Brake pedal going all the way to floor took to dealer he said noting was wrong same day took to local shop they replaced the master clydner and calipers the truck had 36400 miles the repair seam to fix the problem very strange that the dealer did not want to address the issue when coming to a stop break pedal with pressure would go to the floor felt like there was no pedal left by pumping break pedal you could get pressure back but it would go back to floor it also would do this stoped at red light

- Jackson, TN, USA

Was on a freeway exit. Traffic was heavy, and I was in stop and go traffic for about 10 minutes. I was just rolling forward and when I applied the brakes the pedal went down to near bottom and immediately warning lights came on indicating low brake fluid. I cleared the screen and continued carefully to my shop which was within a couple of miles. I added brake fluid to the max mark thinking I could nurse it to the dealer for repairs later in the day. When I attempted that trip several hours later the pedal went to the floor again and I had little or no brake power. I decided to have the truck towed and pulled back slowly into the parking space. I had no brake at this point and actually had to jam the transmission into park a couple of feet before hitting my own building. That is where the tow truck picked it up.

- Salt Lake City, UT, USA

I was driving on the freeway at 65 miles per hour when I had a sudden warming light flash saying brake fluid problem. I tested the brakes and they went to the floor. Total brake failure with no warning. The truck has 29,000 miles and was serviced within last 2 months. This could have very bad and had tragic consequences. I fortunately was able to down shift using the manual shift feature and slow down and stop safely. This is a serious issue. My family and I could have been in a serious accident and hurt ourselves or others. Ford needs to get this figured out asap. Call me with any questions.

- Agoura Hills, CA, USA

Brake master cylinder failed, pedal went to floor with no warning and almost crashed. Topped off brake fluid, and still no brakes. Pulled cap off vacuum booster and booster was full of brake fluid. Now truck is smoking badly I believe from brake fluid being sucked into vacuum hose. Only 30,000miles on truck 2015 F150 with 3.5L

- Upland, CA, USA

3.5 liter V6 ecoboost sudden and complete loss of braking ability without warning brake pedal going to the floor with sudden and complete loss of brake effectiveness brake warning lamp illumination and low brake fluid level comes on after complete loss of brakes, slowed down with emergency brake luckily at low speed added 1 quart of dot4 brake fluid brake warning lamp illumination and low brake fluid level disappeared brake pedal went to the floor with sudden and complete loss of brake effectiveness brake warning lamp illumination and low brake fluid level did not come on until after brakes failed I did not have an accident but it was close. Took to shop with complete brake failure. Truck has 39000 miles. The vehicle was on a city street when the brakes failed. No fluid was detected under the vehicle even after adding 1 quart of dot 4 brake fluid and the brakes failed again.

- Salt Lake City, UT, USA

I was driving the the truck this morning and after the 3rd traffic light suddenly I lost break and barely able to stop. I pulled to a gas station slowly. I noticed break fluid was below minimum. Filled up break fluid to maximum. I tried to drive to Ford dealer ship but after a few minutes I had no break again so I had vehicle towed to veterens Ford tampa.

- Tampa, FL, USA

I was driving on the street the brake indicator low brake fluid light came on suddenly. I stepped on the brake paddle and there were no brakes. I shifted to 1st gear and coasted to side of the street. I checked reservoir and it was very low. I filled the reservoir but was empty in a few minutes but I did not see any leaks anywhere.

- Albuquerque, NM, USA

Warning notice came on and a minute later brakes completely failed. Luckily I was driving very slowly on a military base.

- San Antonio, TX, USA

As I was driving to work on a secondary street with very light traffic (thankfully), a warning flashed on dashboard regarding low brake fluid. When I touched the brake pedal it vibrated and as I depressed it went all the way to the floor where I had minimal stopping power. With very light traffic I went to a nearby auto parts store and purchased / installed 1 quart of brake fluid. By the time I drove 3 miles to my office, the brake pedal was again on the floor with minimal stopping power. I installed a second quart of fluid with absolutely no sign of a leak anywhere. I had the vehicle towed to the dealer where they advised the master cylinder was leaking the fluid into the booster assembly. They replaced the master cylinder and booster.

- Scottsdale, AZ, USA

While driving on interstate I355 at 70 miles per hour without requiring brakes, I got a chime and then a message on the dash that my brake fluid reservoir was low, then my brake light went on. I checked the brake pedal and it went to the floor without stopping the truck. Luckily I was able to time my distance with traffic and switch lanes and exit the interstate. I managed to get the truck into a parking lot and then checked the brake fluid reservoir. The reservoir was very low, below the minimum level. I contacted a coworker who brought brake fluid to the site and we filled it and pumped the brake pedal. It seemed fine so I drove the truck again going to work. Within another mile the chime and warning came on the dash again. At that time I pulled out of traffic and parked the truck at a bank parking lot. I then called Ford roadside assistance and had the truck brought to the nearest Ford dealership for service. The dealership told me later that night that my master cylinder and my brake booster both failed and caused the issue. I checked on line and found that the NHTSA is investigating this issue on 2015 Ford F150 trucks with the V6 eco-boost engine, which is the same engine in my truck. Before the brake issue happened I drove approximately 5 miles and stopped at several red lights and intersections without any problems.

- Homer Glen, IL, USA

The contact owns a 2015 Ford F-150. While the cruise control was activated, the vehicle braked abruptly. The collision warning indicator illuminated and a chiming sound was heard. The vehicle was taken to a local dealer (watertown Ford located at 1600 9th ave SE watertown, sd 57201) where it was diagnosed, but not repaired. The manufacturer was made aware of the failure and opened case number: 12350340. The failure mileage was 19,200.

- San Diego, CA, USA