Ford F-150 brake failure problems

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 Oct 12, 2026 · Brakes · MT · crash

I put my truck in reverse to get out of a driveway and it kept going and accelerating...the brakes did not work. I ended up goign through a fence at the end of the street and into a shed and my truck finally stopped. I have significant damage to my truck as well as to the homeowners property...the Police classified it as equipment failure and I did not receive a ticket.

Filed Oct 6, 2026 · Brakes · RI · crash

During a panic stop the brakes failed and the pedal went to the floor resulting in a rear end collision. The vehicle is currently with the mechanic but he believes it a failed brake booster. When I checked for related problems it seems the same brake booster (EL3Z-2140-E) in my 2014 F150 V8 5.0L was used in the same year 3.5L but yet the recalls (16S24 and 20S31) didn't include my vehicle

Filed Oct 2, 2026 · Brakes, Electrical · 92,004 miles · MN

The contact owns a 2019 Ford F-150. The contact stated that after hauling a travel trailer and unhooking the vehicle, the parking brake and other lights started flashing and the instrument panel illuminated. The 911 assist was disabled. A part of the power steering was inoperable. The floorboard was saturated with water, which damaged the wiring harness. The driver was unaware because of the rubber floor mats. A mechanic suggested that the contact disconnect the battery. The parking brake failed to release. The contact associated the failure with TSB: 20-2170. The vehicle was taken to the local dealer. The manufacturer was contacted and opened a case. The failure mileage was 92,004.

Filed Sep 28, 2026 · Brakes · KS

Was driving down the road when a series of alerts started popping up on my instrument panel and lost braking ability. The following alerts occurred in the specific order. Parking brake service limited, Brake system failure alert, service advancedtrac. Braking Pedal went to the floor, I continued to stomp on the brake pedal and pump, trying to get a response. The braking system never responded and I eventually came to a rest. My safety as well as any drivers around me was put at risk. The vehicle has not been inspected by dealer as the incident just occured. I inspected the brake fluid level and for any obvious signs of brake failure. The mechanical aspects of the braking system were in working order(fluid level good, pads, rotors all in working order. I turned the truck off and back on and all the alerts subsided and the braking system worked as normal. I drove the truck home 1/2 mile with no issues after the brake failure. I am mechanically inclined, and would have to say this looks to be an electrical or communication failure within the vehicles computer system. There are no alerts or check engine lights on my truck after the incident. In the past my truck stores alerts in the app of anything that comes across the instrument cluster. I find it odd that there is no check engine light or alert to prevent someone from driving the vehicle after such an event, in turn creating another safety risk.

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 Sep 16, 2026 · Brakes · WI

The brake master cylinder on my 2019 F150 had a seal leak which caused all brake fluid loss while towing with my family. Luckily we were able to stop safely, not only for us but others nearby. I know this is a recall that affects vehicles in other years but mine was not included and I feel like it should be because we had total brake failure. This is already documented by Ford recall number 25S37 (which aligns with the federal safety agency's number 25V‑236). I feel like Ford needs to expand the recall to other years as it seems the defective part is more widespread to the ones they recalled. I had a Ford dealer replace the master cylinder and brake booster which is Ford's recommendation based on the rear seal leak of the master cylinder. A low brake fluid warning was all that appeared and by the time I was going to safely stop to check fluid level, there was no braking pressure.

Filed Sep 10, 2026 · Brakes · WY

Driver side brake hose failure at upper crimp on the hose caused loss of brake fluid and spongy peddle

Filed Sep 9, 2026 · Brakes · 106,000 miles · SC

The contact owns a 2014 Ford F-150. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The contact stated that the brake pedal was depressed to the floorboard but failed to respond as intended. The contact enabled the parking brake to stop the vehicle. The vehicle had experienced catastrophic brake failure. The vehicle was taken to the dealer, where it was diagnosed with a leak in the brake master cylinder. The contact was informed that the brake master cylinder, brake booster, and brake vacuum sensor needed to be replaced. The vehicle was not repaired. The manufacturer was contacted by phone, and a case was filed. The failure mileage was approximately 106,000.

Filed Aug 28, 2026 · Brakes, Driver assistance · IA

Received vehicle back from dealer saying prior brake problems had been repaired and confirmed with Ford Engineers. Drove approximately 3 miles before brakes failed again and I was not able to stop at the intersection. Avoided an accident, but had vehicle towed again to be repaired. This is the third complete brake failure in less than 300 miles on the vehicle.