RoadVitals

2021 Ford F-550 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.
11
Latest Apr 14, 2026
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
4
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.
2

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2021 Ford F-550 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

  • Engine215.4%
  • Powertrain (other)17.7%
  • Steering17.7%

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

Fuel system

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

9
reports

From owner reports, verbatim

The contact owns a 2021 Ford F-550 SD. The contact received notification of NHTSA Campaign Number: 24V957000 (Fuel System, Diesel). The local dealer was contacted several times for more than a year, and the contact was advised that the part was not yet available and that the manufacturer had paused the recall campaign. The contact called the manufacturer and was advised that the part for the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure.

NHTSA ID 11731105 · filed Apr 14, 2026

The contact owns a 2021 Ford F-550. 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 11719798 · filed Feb 23, 2026
All 9 reports naming fuel system

Engine

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

2
reports

From owner reports, verbatim

Operator was driving a 2021 Ford F550 equipped with an Altec AT48M aerial upfit. As he was driving the operator noted that the check engine light came on and almost immediately followed by the message center displayed "Low Fuel Pressure" warning. As he was preparing to stop, he could see smoke coming out from under the hood of the truck. As he exited the cab, he could see smoke and flames coming out of the truck.

NHTSA ID 11667475 · filed Jun 17, 2025

While driving down the road at approximately 45 mph, under normal conditions, with no warning indicators the low fuel pressure light came on. When the driver stopped the vehicle he lost all power and observed smoke emanating from the underside and hood of the vehicle. Prior to him exiting the vehicle he observed flames shooting out from under the console towards his feet. Upon exiting the vehicle I saw flames under the hood of the vehicle and utilized his supplied fire extinguisher to attempt to put the fire out. This was futile and to our benefit he had a pressure washer and 119 gallons of water that he was able to put into action to subdue the fire. Noting that the drivers side front fender melted off and a hole melted in the drivers side hood from the fire. The entire engine compartment was burned as well as melted components and plastic in the passenger compartment of the vehicle from the fire.

NHTSA ID 11433239 · filed Sep 16, 2021

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.

1
report

From owner reports, verbatim

The contact owns a 2021 Ford F-550 SD. The contact stated that while his son was driving at unknown speeds and making a right turn, there was an abnormal sound coming from the vehicle. The contact stated that the driver’s side rear dual wheel axle had fractured inside the differential housing. The contact stated that the axle shaft had fractured. The contact stated that the wheels were still connected to the hub and the vehicle lowered to the ground. There were no warning lights illuminated. Additionally, there was differential fluid still in the axle housing. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 101,000.

NHTSA ID 11631487 · filed Dec 18, 2024

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

Steering

Reports naming the steering system — racks, columns, power-steering assist and steering linkage.

1
report

From owner reports, verbatim

While driving and getting off the freeway at approximately 55 PMH truck when into a violent death wobble and had to slam on the brakes and come to a complete stop before it started. Truck has 36,384 miles on it and all front end steering is tight with no play, steering stabilizer was replaced with an aftermarket due to Ford's is an National back order and not known when will be available and Ford told me that this is not covered under warranty or any recall even though there are 5100 of them on back order! I am a 35 year ASE Master Mechanic with a Bachelor Degree is Diesel Power Technology and run a companies fleet of over 40 trucks, we have our own shop and inspected this truck ourselves and repaired.

NHTSA ID 11479389 · filed Aug 15, 2022

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 .