Diagsheet

2018 Ford F-150 · symptom sheet

Brake pedal feels soft or spongy

  • 29owner reports
  • 43,250median miles
  • 3involved a crash

Newest report Aug 26, 2026 · checked Sep 19, 2026

29 of the 90 reports of brake wear on the 2018 F-150 describe soft brake pedal.

Part of Brakes grind, pulse or wear early (90 reports)

Tick what matches of 29 reports

6
24
3
6
13
2

What got replaced

Owners who name the part that was replaced mention the master cylinder (13 reports), the booster (9 reports) and the brake lines (6 reports).

Recalls and investigations

2 recalls on the brakes cover the 2018 model year. A recall on the same system isn't always the same failure, so read the defect text.

25V-236Apr 11, 2025
Service Brakes, Hydraulic:Foundation Components:Master Cylinder

Ford Motor Company (Ford) is recalling certain 2017-2018 F-150, Expedition, and Lincoln Navigator vehicles. The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.

Risk and remedy
Risk: A brake fluid leak can cause reduced brake function and extend the distance required to stop, increasing the risk of a crash.
Remedy: Dealers will replace the brake master cylinder. If the master cylinder is leaking, the brake booster will also be replaced. Repairs will be performed free of charge. Owner notification letters were mailed September 25, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S37. This recall is an expansion of NHTSA recall number 22V-150.
22V-150Mar 11, 2022
Service Brakes, Hydraulic:Power Assist

Ford Motor Company (Ford) is recalling certain 2016-2017 Ford Expedition, Lincoln Navigator, and 2016-2018 F-150 vehicles equipped with 3.5L Ecoboost engines. The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.

Risk and remedy
Risk: A loss of brake fluid may result in a change in brake pedal travel, increased pedal effort and reduced front brake function, requiring greater effort and distance to stop the vehicle. These conditions can increase the risk of a crash.
Remedy: Dealers will replace the brake master cylinder. If the master cylinder is leaking, the brake booster will also be replaced. Repairs will be performed free of charge. An interim owner notification letter notifying customers of the safety defect were mailed on April 29, 2022. Owner notification letters were mailed April 29, 2022. This recall is an expansion of NHTSA recall number 20V-332. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 22S11.

NHTSA investigations into the brakes on the F-150

RQ16-001opened Sep 28, 2016
Brakes · model years 2015 to 2016

Brake master cylinder failure. Closed jul 5, 2020, led to recall 20V-332.

NHTSA summary
On June 8, 2020, Ford Motor Company issued a safety recall (NHTSA Recall No. 20V-332) of 292,311 model year (MY) 2014-2017 Ford F-150 vehicles equipped with 3.5L Ecoboost engines and built from 9/1/2014 to 8/1/2016. Ford stated that the causes of brake fluid loss in the master cylinder are brake fluid contamination that can interfere with rear cup seal function, and rolling of the rearmost cup seal.Prior to total loss of the front brakes, depending on the amount of brake fluid loss in the master cylinder, the driver may receive an audible chime, message center alert and red brake warning indicator in the instrument cluster, and may experience a change in brake pedal travel and increased pedal effort. It should be noted that a small number of late-built MY 2014 and early-built MY 2017 F-150 vehicles are included in the recall along with the subject vehicles (MY 2015-2016).This Recall Query is closed based on the safety recall issued by Ford. The ODI reports cited above can be viewed at NHTSA.gov under the following ID numbers:10734951 10839988 10862418 10872737 10873438 10876359 10881590 10883442 10885352 10888026 10888524 10891826 10891829 10891886 10893632 10894688 10894844 10896122 10896446 10898079 10899093 10899198 10902944 10903776 10904695 10908281 10910101 10913678 10913867 10914016 10914164 10914288 10914361 10914382 10914483 10914507 10915027 10915894 10916302 10916346 10916578 10920258 10925699 10926076 10926148 10926179 10927388 10927402 10927459 10927578 10928457
PE16-003opened Feb 29, 2016
Brakes · model years 2013 to 2014

Master cylinder external leak. Closed jul 26, 2016, led to recall 16V-345.

NHTSA summary
On May 23, 2016, Ford Motor Company (Ford) submitted a Defect Information Report (DIR) to NHTSA regarding a master cylinder defect that could result in loss of the front brake circuit in approximately 225,012 model year 2013 through 2014 Ford F-150 vehicles equipped with 3.5-liter GTDI engines and built at the Dearborn Truck Plant from August 1, 2013 through August 22, 2014; and the Kansas City Assembly Plant from August 1, 2013 through August 31, 2014 (NHTSA Recall #16V-345, Ford Recall #16S24).Ford indicated that the rearmost cup seal in the brake master cylinder may roll, resulting in leakage from the brake fluid reservoir to the brake booster.According to Ford's DIR, Depending on the amount of brake fluid loss from the brake master cylinder into the brake booster, the driver will experience an audible chime, message center alert, red brake warning light in the instrument cluster and may begin to experience a change in brake pedal travel and feel.In the event that a loss of brake fluid is substantial enough to reduce brake function to the front wheels, the driver may experience longer pedal travel, increased pedal effort, and extended stopping distance, increasing the risk of a crash.Full braking function would remain in the rear wheel brake circuit.Ford's recall will replace the master cylinder and, if the master cylinder is leaking, also replace the brake booster.Seventy-three (73) of the complaints received by ODI contained vehicle identification number (VIN) informatio
EA15-006opened Oct 16, 2015
Service Brakes, Electric · model years 2011 to 2012

Brake vacuum pump failure. Closed apr 28, 2016.

NHTSA summary
On February 15, 2016, Ford Motor Company initiated Customer Satisfaction Program 15N05 to extend warranty coverage for the electric vacuum pump in certain model year (MY) 2011 through 2012 Ford F-150 pickup trucks equipped with 3.5L GTDI engines.The program extends coverage for up to 10 years of service or 150,000 miles from the warranty start date of the vehicle, all vehicles are eligible for the program through July 30, 2016 regardless of mileage.Ford's program covers all repairs related to electric vacuum pump (EVP) malfunctions including excessive noise, vibration, or change in brake pedal feel while applying the brakes at cold start. Ford states that the engine intake manifold is the primary source of vacuum for the brake booster and is fully compliant to motor vehicle safety standards without the supplemental vacuum supplied by the EVP.The company also contends that failure modes related to the EVP are progressive and provide warning to operators by way of noise and vibration before an operator to experience any temporary change in brake pedal feel.ODI's analysis of warranty data found that the majority of claims involved consumer concerns with EVP noise or vibration from the left front fender area when the vehicle is first started. Continued operation in this mode with pump motor noise will eventually result in the EVP seizing or becoming non-functional.Component failure analysis indicated that Ford and its supplier, Continental, identified a pump crank drive corrosion
PE15-026opened Jun 22, 2015
Service Brakes, Electric · model years 2011 to 2012

Brake vacuum pump failure. Closed oct 19, 2015.

NHTSA summary
On June 22, 2015, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE15-026 to investigate incidents of increased brake pedal effort at cold start and extended stopping distance while driving in traffic, resulting from failures of the electric brake vacuum assist pump in model year (MY) 2011-2012 Ford F-150 pickup trucks equipped with 3.5L GTDI engines. In response to ODI's Information Request (IR) for PE15-026, Ford provided ODI with 396 complaints and field reports relating to incidents of increased brake pedal effort or malfunctions in the electric vacuum pump (EVP). ODI's analysis of the data provided by Ford identified 7 crashes and 1,851 warranty claims related to either a hard brake pedal condition or reduced brake effectiveness. Additionally, ODI identified one report in its database alleging an injury to an occupant of a vehicle struck in the rear by a subject F-150 vehicle with a failed EVP as documented in the police accident report referencing a dealer assessment of the pump.According to Ford, the subject vehicles utilize a traditional brake vacuum booster to provide power assist for braking and the EVP is intended to operate to maintain consistent brake pedal feel. The engine intake manifold is the primary source of vacuum for the booster and is fully compliant to motor vehicle safety standards without the EVP. Ford described the conditions related to a change in brake pedal feel as limited and temporary and provided component failure anal
PE08-001opened Jan 8, 2008
Service Brakes, Hydraulic · model years 2005 to 2006

Loss of brake power-assist. Closed may 9, 2008, led to recall 08V-208.

NHTSA summary
BY LETTER DATED MAY 5, 2008, FORD MOTOR COMPANY (FORD) NOTIFIED THE AGENCY THAT IT WILL CONDUCT A SAFETY RECALL (NHTSA RECALL NUMBER 08V-208) TO ADDRESS A MANUFACTURING DEFECT IN APPROXIMATELY 605,684 MODEL YEAR (MY) 2005 AND 2006 FORD F-150 AND LINCOLN MARK LT VEHICLES ORIGINALLY EQUIPPED WITH THE 5.4L DISPLACEMENT, 3-VALVE PER CYLINDER, V-8 ENGINE.THE RECALLED VEHICLES WERE BUILT FROM JULY 18, 2004 THROUGH MAY 31, 2006 AT THE DEARBORN TRUCK PLANT; FROM MAY 4, 2004 THROUGH MAY 31, 2006 AT THE KANSAS CITY ASSEMBLY PLANT; AND FROM APRIL 19, 2004 THROUGH MAY 31, 2006 AT THE NORFOLK TRUCK PLANT.THE VEHICLES WERE MANUFACTURED WITH THE SAME DEFECTIVE BRAKE BOOSTER VACUUM SUPPLY HOSE ASSEMBLY UNIQUE TO THE 5.4L V-8 ENGINE.FORD F-150 VEHICLES EQUIPPED WITH OPTIONALLY AVAILABLE 4.2L V6 AND 4.6L V-8 ENGINES ARE NOT INCLUDED IN THIS RECALL ACTION BECAUSE THEY UTILIZE A DIFFERENT, ONE-PIECE BRAKE BOOSTER VACUUM SUPPLY HOSE ASSEMBLY THAT DOES NOT EXHIBIT AN APPARENT DEFECT TREND. THE RECALLED VEHICLES UTILIZE A TWO-PIECE BRAKE BOOSTER VACUUM SUPPLY HOSE ASSEMBLY COMPRISED OF A STANDPIPE ASSEMBLY AND VACUUM HOSE.THE STANDPIPE ASSEMBLY ATTACHES TO A FITTING ON THE ENGINE AIR INTAKE MANIFOLD UTILIZING A FLEXIBLE RUBBER HOSE AND PLASTIC ELBOW.THE VACUUM HOSE ATTACHES TO THE OPPOSITE END OF THE STANDPIPE ASSEMBLY AND CONNECTS TO A CHECK VALVE FITTING AT THE BRAKE BOOSTER ASSEMBLY.ACCORDING TO FORD, THE PORTION OF THE BRAKE BOOSTER VACUUM SUPPLY HOSE ASSEMBLY ATTACHED TO THE INTAKE MANIFOLD MA
EA93-020opened Jul 28, 1993
Service Brakes, Hydraulic · model years 1992

Parking brake failure. Closed sep 23, 1994, led to recall 94V-169.

NHTSA summary
There is no summary currently available
PE93-015opened Mar 9, 1993
Service Brakes, Hydraulic · model years 1992

Parking brake failure. Closed jul 27, 1993.

NHTSA summary
There is no summary currently available
EA91-044opened Oct 30, 1991
Service Brakes, Hydraulic · model years 1991

Loss of brake effectivenes. Closed oct 30, 1992, led to recall 92V-026.

NHTSA summary
===
PE91-077opened May 23, 1991
Service Brakes, Hydraulic · model years 1991

Loss of brake effectivenes. Closed oct 31, 1991.

NHTSA summary
There is no summary currently available

None of these investigations covers the 2018 model year.

When it happens

The middle half of failures fell between 18,335 and 101,000 miles, from the 16 reports that gave a mileage.

218
519
222
223
224
725
926

What owners wrote

“Master cylinder leaked and got a low brake fluid level warning and within one mile lost brakes with pedal depression all the way to the floor. Ford has a current recall for other makes and models which appears to be a manufacturer defect. My truck is currently in the dealership getting repaired”

Filed Jun 9, 2026

“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 26, 2026

“My truck has been regularly serviced by FORD and yesterday out of the blue the brake pedal went soft and i got a check engine light saying low fluid. Upon inspection we noticed all brake fluid had leaked with no visible exit. We refilled the fluid and the next day, the fluid was completely drained again with no visible exit. Upon expert inspection it was noted the brake master cylinder is leaking into the booster.”

Filed Aug 6, 2025

“Brake fluid was leaking internally into the booster. This caused a low level brake fluid alarm with an immediate soft pedal resulting a significant delay in braking response. Ford has issued a recall for this specific master cylinder leak. However, my vehicle shows no recalls.”

Filed Aug 17, 2022

Should you keep driving it?

This page can't tell you that. 3 of 29 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.

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