2018 Ford F-150: brake failure

Filed Oct 21, 2026 · Brakes · AL

The brake hydraulic system on my 2018 Ford F-150 failed. The vehicle rapidly lost brake fluid, the brake pedal began sinking, and there was no obvious external brake-fluid leak. An independent repair facility later replaced both the brake master cylinder and the power brake booster. I have the repair invoice and service records available. I do not know whether the removed components were retained by the repair facility. This failure created a serious safety risk because the vehicle was losing brake fluid and braking ability could have been reduced or lost. I had to repeatedly add brake fluid because the reservoir level would drop again after only a short distance. The sinking brake pedal made the vehicle unsafe to continue driving normally. The problem was confirmed and repaired by an independent service center. The master cylinder and power brake booster were replaced, along with a brake-system flush. The symptoms are similar to those described in Ford Recall 25S37 / the federal safety agency Recall 25V‑236, which involves certain 2017-2018 Ford F-150 vehicles where the master-cylinder rear seal can allow brake fluid to leak into the brake booster. My VIN is not currently included in that recall. The vehicle has not, to my knowledge, been inspected by Ford specifically for this failure. The independent repair facility performed the repair. I am requesting that the federal safety agency review whether this vehicle may represent the same or a similar defect occurring outside the current recall population. Before the original brake failure, I did not receive a brake-system warning lamp or message that alerted me to the rapid brake-fluid loss. The main symptoms were the brake-fluid reservoir repeatedly becoming very low and the brake pedal sinking. After the master cylinder and brake booster were replaced, a new warning began appearing stating “Park Brake Limited Function.” This warning was not present before the repair. The vehicle has been returned to the repair facility four times for this warning. T

Filed Sep 22, 2026 · Brakes · MT

While driving my brakes went from normal, to squishy, to total loss of brakes. Brake indicator light came on while in the squishy phase. After avoid collision by nothing other than sure luck I was able to slow the vehicle and use the emergency brake to stop. Once stopped I popped the hood and found the master cylinder to be all but empty. I obtained brake fluid, filled the cylinder and the brakes appeared to be normal. After a very short drive I lost brake function again and the MC was empty. No leaks could be found from lines or around the wheels Truck was towed to an independent shop where the diagnostic determined the master cylinder seal had failed and leaked brake fluid into the brake booster. I believe the Hitachi master cylinder failure is a known Ford defect. It has been recalled on the 3.5L model F150's but not the 2.7L and 5.0L models. My loss of brakes could have led to serious or fatal traffic incidence. The master cylinder is defective on all models of the years involving the recall of the 3.5L models. The recall should be extended before someone loses their life. Please look to extend the recall to include the other models of F150s.

Filed Aug 26, 2026 · Brakes · NV

My 2018 Ford F-150 is experiencing a dangerous loss of braking power, a soft/spongy brake pedal, and brake fluid leaking from the master cylinder into the brake booster. These are the exact symptoms and component failures described in Ford Recall Campaign 25S37 (the federal safety agency Campaign 25V236). However, when checking my VIN, I am told my truck is excluded from the recall population. Because my vehicle is exhibiting the identical safety defect, the current recall window is too narrow and needs to be expanded to cover my vehicle before a serious collision occurs.

Filed Aug 11, 2026 · Brakes · 114,089 miles · TX

The contact owns a 2018 Ford F-150. The contact stated that while driving 55 MPH, the message "Brake Fluid Level Low" was displayed. The brake pedal was depressed and went to the floorboard. The contact stated that the brakes failed to work properly. The contact drove to Walmart and purchased brake fluid to add to the vehicle, but the failure persisted. The contact added more brake fluid, but the failure recurred, and the engine made a knocking sound with smoke coming from the exhaust pipe. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact related the failure to the federal safety agency Campaign Number: 22V150000 (Service Brakes, Hydraulic); however, the VIN was not included in the recall. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 114,089.

Filed Aug 7, 2026 · Brakes · SC

While engaging my brakes at a traffic light, suddenly the brake pedal went to the floor. Once I was able to safely park the vehicle (because there was no brake function), I inspected around the tires, brake fluid, and brake calipers. I noticed a puddling of brake fluid around the front passenger tire. Upon removing the tire, and inspecting this brake hose, I noticed the brake hose was visibly ruptured. I went to a local Ford dealership to purchase the replacement part, and fix this issue.

Filed May 26, 2026 · Brakes · ID

While driving this vehicle, the brake line was cut after making contact with the A arm assembly, at the highest point on the line. I immediately lost my brakes as the brake pedal went to the floor. I am extremely lucky that I was able to stop within the parking lot that I had just entered and did not have to make an immediate stop.

Filed May 21, 2026 · Brakes · CO

Brakes completely failed. Foot went to the floorboard and car did not stop. Drove until is was slowed down enough to throw it into park. Engine light stated low on brake fluid. Filled it up and it went about a mile before brakes failed again. Took to a mechanic who determined that brake cylinder and booster had failed. Called Ford who said my 2018 Ford F-150, built in Kansas City was not in the Ford April 14, 2025 recall (25S37) as the build date on my vehicle was a few months after the May 19, 2017 cut off. However it is clear that later built models also had the same problem with the defective brake cylinder as the earlier builds. I suspect they used the same part. Ford should expand the date of brake failure to cover repair of later models with failed brake booster and master cylinder.

Filed Apr 20, 2026 · Brakes · MI

The BRAKE light came on right as I parked with the warning that my brake fluid was low. Opened the hood and noticed the reservoir was low but could not see any sign of a leak. When I pushed the brake to put the truck in reverse, the pedal went to the floor. After testing it in the parking lot, the truck eventually stopped after having pressing the pedal all the way down. I was able to get it to the auto shop down the street. That is where they told me there was a recall out for the master cylinder leaking internally (recall 25V‑236) but my VIN is not part of it. Took it then to the Ford dealership where they confirmed I needed a new master cylinder and booster but it was not covered under the recall.

Filed Apr 1, 2026 · Brakes · HI

While driving a chime rang with message “low brake fluid”. Immediately noticed brake pedal soft and braking dramatically reduced. Was able to stop the vehicle close by gas station. Purchased 2 16 ounce bottles brake fluid. The reservoir was almost empty and I put in 16 ounces. Brake warning message was gone. Proceeded home which was 5 miles away. As I neared home warning returned. Once home I checked the reservoir and it was empty. Put the other 16 ounces in and checked for leaked under the truck. Found no leaked. Did some research and saw there was a recall for the brakes. • The Defect: The master cylinder's piston cup seals can fail, causing brake fluid to leak into the brake booster, reducing hydraulic pressure, I tried to move my truck but when I pressed on the brakes the pedal went all the way to the floor. Was able to put in neutral and stop the truck safely. I had the truck towed to Honolulu Ford. Was informed my truck was not included in the recall. They replaced the brake master cylinder, brake booster, and vacuum tube. At a cost of $2490.85. I believe Ford should have fixed this at no cost because the exact issue has been addressed on 2 previous recalls . From the time I got the message of low brake fluid to not having any brakes was almost immediately. I believe this could have been much worse. Prior to this I did not have any issues with the brakes. I check fluid levels regularly and never had to add brake fluid.

Filed Feb 15, 2026 · NV · fire

Front Driver and Passenger side Wheel Bearing Failure 2 Separate incidents on same vehicle described below Hello, We have a 2018 F-150 Ford Limited and at approximately 50k/60k miles our front passenger Wheel Bearings went bad causing a loss of brakes and then proceeded to catch a fire within the brakes as a result. At approximately 80k miles we are now replacing the driver side Wheel Bearings as they are now currently at risk of failing. We have owned many vehicles and have not had to replace Wheel Bearings on any of them regardless of how we used them, the age of the vehicle and the type. We find that it is oddly unusual for this type of failure to occur let alone on both Wheel Bearings. The only indication of the second failure has been a grinding sound that can be easily mistaken for brakes or rotors needing attention. At the time of the first failure while the truck was in motion on the freeway exceeding 65mph, there was no indication of the failure other than loss of brakes and smell from the fire. The problem was seen by a licensed mechanic for the first failure who did confirm the Wheel Bearing failed. We have a scheduled appointment for 2/23/26 to confirm the same issue for the driver side. We did not maintain and keep the first component that failed however we will request to keep the failed parts upon replacement. This failure absolutely put my life at risk, my passengers lives at risk and those that were on the roadways during the time the failure occurred.

Filed Sep 10, 2025 · Brakes, Fuel system · TX

The brake system on my 2018 Ford F-150 2.7L EcoBoost began failing around early 2025 with a brake warning light illuminating and the pedal feeling soft, signaling a problem. The brake fluid reservoir dropped low repeatedly despite topping it off multiple times with DOT 3 fluid, indicating a persistent leak. By 09:52 AM CDT today, September 10, 2025, the brake pedal lost all pressure, making the vehicle completely undrivable and posing a severe safety risk due to significantly increased stopping distances and potential brake failure. At 10:37 AM CDT, thick white smoke started billowing from the exhaust each time the vehicle was started, likely from brake fluid leaking into the engine via the brake booster, a symptom matching Ford recall 25S37 (the federal safety agency 25V236) for a defective brake master cylinder seal. This failure endangers the driver, passengers, and other road users, as the truck is a primary vehicle, with the smoke suggesting a fire hazard and possible engine damage like stalling or misfires. The issue is reproducible, with the warning light, fluid loss, and soft/no pedal persisting since early 2025, worsening today with the smoke appearing consistently on startup. It has not been confirmed by a dealer or service center yet, as the vehicle is undrivable, but I plan to tow it to a Ford dealership for inspection under the recall. No manufacturer, police, insurance, or other inspection has occurred, as the smoke issue escalated this morning; prior rear left electronic parking brake actuator replacements in 2025 due to fluid leaks were done at home. The brake master cylinder and possibly the brake booster are the failed components, with the actuator issue likely related, and the vehicle is available for inspection upon request or at a dealership. Symptoms first appeared with the warning light and soft pedal in early 2025, followed by fluid loss, complete pedal failure, and smoke today at 09:52 AM CDT.

Filed Aug 22, 2025 · Brakes · AZ

Had a SUDDEN loss of braking ability. While starting to drive the truck home, the brake pad went flat. Checked the brake reservoir and it was empty. Refilled with brake fluid and drove 2 miles, brakes went out when arriving in the driveway. It went empty again within 15 minutes. No noticeable leak. No breaks on the truck to drive the vehicle. The vehicle had to be towed to the nearest dealer due to having NO brakes. Turns out the brake fluid was leaking into the booster. Noticed many other 2018 Ford F150 trucks were recalled for the same issue.