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2021 Ford F-450 Sd Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
17
Latest Jun 9, 2026
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
9
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
1

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2021 Ford F-450 Sd, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Electrical521.7%
  • Brakes313.0%
  • Body & structure313.0%
  • Fuel system313.0%
  • Powertrain (other)313.0%
  • Interior & seats28.7%
  • Engine28.7%
  • Other / unspecified14.3%
  • Tires & wheels14.3%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Electrical

Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.

5
reports

From owner reports, verbatim

My 2021 Ford F 450 will not actuate the electric over hydraulic brakes on my gooseneck trailer. I was hauling my tractor to one of my hay fields when a car pulled out in front me. I apply my foot to the brake pedal and the truck and trailer did not slow down liked it use to and I almost rear ended the vehicle that pulled out in front of me. After this I try to apply just the trailer brakes using the brake actuator on the dash and the trailer brakes never operated. I check my fuses and they were good and I checked the trailer using another truck and they worked. I then checked the trailer wiring connections on my truck and they were good. I have done a manual reset on my trucks programming and the truck still will not activate the trailer brakes. Please help.

NHTSA ID 11673852 · filed Jul 16, 2025

The contact owns a 2021 Ford F-450 SD. The contact stated while the vehicle was parked on the side of the road, the driver attempted to start the vehicle, but the vehicle failed to restart. The vehicle was towed to the dealer, where it was diagnosed that the battery junction box harness had failed. The dealer replaced the battery junction box harness assembly, engine module, fuse junction box, and the wiring assembly needed to be replaced. The vehicle was repaired. The contact related the failure to TSB Number: 20-2298. The manufacturer was notified of the failure and a case was opened. The manufacturer referred the contact to the NHTSA Hotline for assistance. The failure mileage was 124,483.

NHTSA ID 11602615 · filed Jul 16, 2024

Too few reports in this category for a page of its own — they appear in the full complaint list.

Brakes

Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.

3
reports

From owner reports, verbatim

The contact owned a 2021 Ford F-450 Super Duty. The contact stated that while driving 35 MPH on an 8 percent decline and pulling a trailer, the vehicle slightly responded upon depressing the brake pedal. Additionally, the transmission failed to downshift and was stuck in 10th gear. The contact pumped the brakes; however, the failure persisted. The contact drove into the shoulder of the roadway, and the vehicle was able to stop. The contact noticed smoke, and upon inspecting underneath the vehicle, the contact noticed that the rear brakes were on fire. The contact was able to extinguish the fire with a fire extinguisher. There was no injury sustained. The vehicle was towed to the residence of the contact's friend, where the trailer was detached from the vehicle. The vehicle was driven to the dealer, where it was test-driven, and the contact was informed that no failure was found. The vehicle was taken back to the residence of the contact's friend. The contact stated that upon depressing the brake pedal to start the vehicle, the brake pedal travelled all the way to the floorboard. The vehicle was taken back to the dealer and traded for another vehicle. The vehicle was being repaired. The manufacturer was notified of the failure and referred the contact to the dealer for assistance. The failure mileage was approximately 78,000.

NHTSA ID 11687296 · filed Sep 15, 2025

My 2021 Ford F 450 will not actuate the electric over hydraulic brakes on my gooseneck trailer. I was hauling my tractor to one of my hay fields when a car pulled out in front me. I apply my foot to the brake pedal and the truck and trailer did not slow down liked it use to and I almost rear ended the vehicle that pulled out in front of me. After this I try to apply just the trailer brakes using the brake actuator on the dash and the trailer brakes never operated. I check my fuses and they were good and I checked the trailer using another truck and they worked. I then checked the trailer wiring connections on my truck and they were good. I have done a manual reset on my trucks programming and the truck still will not activate the trailer brakes. Please help.

NHTSA ID 11673852 · filed Jul 16, 2025

Too few reports in this category for a page of its own — they appear in the full complaint list.

Body & structure

Reports naming the vehicle structure, frame, body panels, doors, hood and trim.

3
reports

From owner reports, verbatim

My F-450 has had the tailgate recall 19S48 completed. However, this did not correct the problem and the tailgate still unlatches and extends without warning while driving. In this latest incident, a cargo trailer I was towing was severely damaged as a result.

NHTSA ID 11527528 · filed Jun 17, 2023

TAILGATE OPENED UNINTENDED CAUSING MINOR DAMAGE TO RAIL COVER AND TAILGATE.

NHTSA ID 11403417 · filed Mar 17, 2021

Too few reports in this category for a page of its own — they appear in the full complaint list.

Fuel system

Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.

3
reports

From owner reports, verbatim

The contact owns a 2021 Ford F-450 SD. The contact received notification of NHTSA Campaign Number: 24V957000 (Fuel System, Diesel); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure.

NHTSA ID 11687332 · filed Sep 15, 2025

VEHICLE SHUT DOWN WHILE IN MOTION ON HIGHWAY WHICH CAUSED FOR BRAKES AND STEERING TO FAIL. VEHICLE WAS TOWED TO SUN STATE FORD DEALERSHIP WHERE THEY DID A DIAGNOSIS. THEY FOUND EXCESSIVE AMOUNTS OF METAL IN THE HIGH PRESSURE FUEL SYSTEM. THEY HAD TO REPLACE THE ENTIRE FUEL SYSTEM PLUS REPLACED ALL INJECTORS WHICH NOW HAS AN OPEN INVOICE OF $15,923.97. AFTER RESEARCH WE FOUND OUT THAT THERE IS A RECALL ON THE CP4 WHICH IS THE MANUFACTIRE RECALL NUMBER 24S78 AND NHTSA RECALL NUMBER 24V957. FORD IS NOT WILLING TO COVER THE COST OF THE RECALL REPAIRS AND THE DEALERSHIP IS NOT COOPERATING AS WELL. THIS IS A COMPANY VEHICLE LOSING THE COMPANY $3K PER DAY.

NHTSA ID 11676722 · filed Jul 28, 2025

Too few reports in this category for a page of its own — they appear in the full complaint list.

Powertrain (other)

Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.

3
reports

From owner reports, verbatim

The contact owned a 2021 Ford F-450 Super Duty. The contact stated that while driving 35 MPH on an 8 percent decline and pulling a trailer, the vehicle slightly responded upon depressing the brake pedal. Additionally, the transmission failed to downshift and was stuck in 10th gear. The contact pumped the brakes; however, the failure persisted. The contact drove into the shoulder of the roadway, and the vehicle was able to stop. The contact noticed smoke, and upon inspecting underneath the vehicle, the contact noticed that the rear brakes were on fire. The contact was able to extinguish the fire with a fire extinguisher. There was no injury sustained. The vehicle was towed to the residence of the contact's friend, where the trailer was detached from the vehicle. The vehicle was driven to the dealer, where it was test-driven, and the contact was informed that no failure was found. The vehicle was taken back to the residence of the contact's friend. The contact stated that upon depressing the brake pedal to start the vehicle, the brake pedal travelled all the way to the floorboard. The vehicle was taken back to the dealer and traded for another vehicle. The vehicle was being repaired. The manufacturer was notified of the failure and referred the contact to the dealer for assistance. The failure mileage was approximately 78,000.

NHTSA ID 11687296 · filed Sep 15, 2025

VEHICLE SHUT DOWN WHILE IN MOTION ON HIGHWAY WHICH CAUSED FOR BRAKES AND STEERING TO FAIL. VEHICLE WAS TOWED TO SUN STATE FORD DEALERSHIP WHERE THEY DID A DIAGNOSIS. THEY FOUND EXCESSIVE AMOUNTS OF METAL IN THE HIGH PRESSURE FUEL SYSTEM. THEY HAD TO REPLACE THE ENTIRE FUEL SYSTEM PLUS REPLACED ALL INJECTORS WHICH NOW HAS AN OPEN INVOICE OF $15,923.97. AFTER RESEARCH WE FOUND OUT THAT THERE IS A RECALL ON THE CP4 WHICH IS THE MANUFACTIRE RECALL NUMBER 24S78 AND NHTSA RECALL NUMBER 24V957. FORD IS NOT WILLING TO COVER THE COST OF THE RECALL REPAIRS AND THE DEALERSHIP IS NOT COOPERATING AS WELL. THIS IS A COMPANY VEHICLE LOSING THE COMPANY $3K PER DAY.

NHTSA ID 11676722 · filed Jul 28, 2025

Too few reports in this category for a page of its own — they appear in the full complaint list.

Interior & seats

Reports naming seats, latches, locks, linkages and interior fittings.

2
reports

From owner reports, verbatim

My F-450 has had the tailgate recall 19S48 completed. However, this did not correct the problem and the tailgate still unlatches and extends without warning while driving. In this latest incident, a cargo trailer I was towing was severely damaged as a result.

NHTSA ID 11527528 · filed Jun 17, 2023

While towing my gooseneck horse trailer the tailgate opened randomly. I had towed for about 20 miles and got off the freeway and was driving through a parking lot when it happened. When I turned the tailgate struck the horse trailer causing body parts to fall in the roadway which could be dangerous to other motorist. Normally when the tailgate is open a message appears on the dash. No message was received, no buttons on keys or dash were depressed to cause this to occur.

NHTSA ID 11429287 · filed Aug 16, 2021

Too few reports in this category for a page of its own — they appear in the full complaint list.

Engine

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.

2
reports

From owner reports, verbatim

VEHICLE SHUT DOWN WHILE IN MOTION ON HIGHWAY WHICH CAUSED FOR BRAKES AND STEERING TO FAIL. VEHICLE WAS TOWED TO SUN STATE FORD DEALERSHIP WHERE THEY DID A DIAGNOSIS. THEY FOUND EXCESSIVE AMOUNTS OF METAL IN THE HIGH PRESSURE FUEL SYSTEM. THEY HAD TO REPLACE THE ENTIRE FUEL SYSTEM PLUS REPLACED ALL INJECTORS WHICH NOW HAS AN OPEN INVOICE OF $15,923.97. AFTER RESEARCH WE FOUND OUT THAT THERE IS A RECALL ON THE CP4 WHICH IS THE MANUFACTIRE RECALL NUMBER 24S78 AND NHTSA RECALL NUMBER 24V957. FORD IS NOT WILLING TO COVER THE COST OF THE RECALL REPAIRS AND THE DEALERSHIP IS NOT COOPERATING AS WELL. THIS IS A COMPANY VEHICLE LOSING THE COMPANY $3K PER DAY.

NHTSA ID 11676722 · filed Jul 28, 2025

High pressure fuel pump failed while driving towing a trailer. Was able to pull over safely, entire fuel system needs to be replaced. Unknown if anything else was damaged yet. Vehicle is still in for repairs, estimate is between 9-13k parts and labor. I hope it didn't destroy the entire engine.

NHTSA ID 11633674 · filed Jan 2, 2025

Too few reports in this category for a page of its own — they appear in the full complaint list.

Other / unspecified

Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.

1
report

From owner reports, verbatim

The contact owns a 2021 Ford F-450. The contact received notification of NHTSA Campaign Number: 21V379000 (Trailer Hitches). The contact called multiple local dealers, Texas Country Ford (321 E Coke Rd, Winnsboro, TX 75494: (903) 342-3700), Tyler Ford, LTD (2626 S SW Loop 323, Tyler, TX 75701:(800) 788-7876) and Pegues-Hurst Motor Company (200 TX-63 Spur, Longview, TX 75601: (903) 758-6211) and was informed that the dealer was not equipped to perform the recall repair. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID 11454118 · filed Feb 25, 2022

Too few reports in this category for a page of its own — they appear in the full complaint list.

Tires & wheels

Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.

1
report

From owner reports, verbatim

Technician was airing the tires - zipper ruputer occured on the inside of the tire. 225/70R19.5

NHTSA ID 11720607 · filed Feb 26, 2026

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .