See attached document for complaint,
The worst 2021 Ford F-750 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine1
Recalls 3
Fuel system, diesel: delivery: fuel pump
- What is wrong
- Ford Motor Company (Ford) is recalling certain 2020-2022 F-Super Duty F250, F350, F450, F550, F600, and 2021-2022 F-650, F750 vehicles. Biodiesel deposits may form on the pump drivetrain roller components, which could lead to failure of the high pressure fuel pump.
- Risk
- High pressure fuel pump failure can cause a loss of drive power, increasing the risk of a crash.
- Remedy
- Dealers will update the powertrain control module (PCM) and Transmission Control Module (TCM) software, free of charge. Owner notification letters were mailed January 23, 2026. Owners may contact Ford customer service at 1‑866‑436‑7332. Ford's number for this recall is 24S78.
Recall number 24V957000 · Recall details
Fuel system, diesel
- What is wrong
- Ford Motor Company (Ford) is recalling certain 2021 Super Duty F-250, F-350, F-450, F-550, F-600, and Medium Duty F-650 and F-750 vehicles equipped with 6.7L diesel engines. A small void may be present in the top-center of the vehicle's underhood secondary fuel filter cap, which may progress to a pinhole over time, allowing fuel to leak from the top of the secondary fuel filter.
- Risk
- A fuel leak in the presence of an ignition source can increase the risk of a fire or injury.
- Remedy
- Dealers will replace the primary and secondary fuel filters, free of charge. Owner notification letters were mailed January 28, 2022. Owners may contact Ford customer service at 1‑866‑436‑7332. Ford's number for this recall is 22S01.
Recall number 22V013000 · Recall details
Power train: automatic transmission: cooling unit and lines
- What is wrong
- Ford Motor Company (Ford) is recalling certain 2021 F-650 and F-750 vehicles equipped with 7.3L gas engines. The transmission oil cooler line may contact the air conditioning compressor pulley, possibly causing a transmission fluid leak.
- Risk
- Leaking transmission fluid may contact hot engine components, increasing the risk of an engine compartment fire.
- Remedy
- Ford will notify owners, and dealers will inspect transmission oil cooler lines for proper orientation and damage, correcting the lines and replacing any that are damaged, free of charge. The recall began December 21, 2020. Owners may contact Ford customer service at 1‑866‑436‑7332. Ford's number for this recall is 20S66.
Recall number 20V691000 · Recall details
See all 3 recalls for the 2021 Ford F-750
Defect investigations
Camshaft and Lifter Failure in Ford 7.3L Gasoline Engines
The Office of Defects Investigation (ODI) received a petition on June 13, 2026, requesting an investigation into camshaft and lifter failures in Ford 7.3L gasoline engines used in 2021-2022 Ford E-350 and 2021 Ford F59 and F-750 vehicles. The Petitioner alleges that insufficient oil lubrication at low idle (~6 psi) causes severe wear on lifter rollers and camshaft lobes, leading to catastrophic engine failure and sudden loss of motive power while driving at highway speeds with little to no warning. The petition further alleges that Ford Motor Company was aware of the root cause and released a software calibration patch raising idle speed to ~1,000 RPM, but failed to initiate a public safety recall or notify vehicle owners. The petition itself can be reviewed at under ODI number 11764421. This defect petition has been opened to evaluate the issue and determine whether to grant or deny the petition.
DP26011
Technical service bulletins for the 2021 Ford F-750 13
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Certain 2020-2023 Model Year Bronco Sport, Escape, Corsair, E-Series, F-650/F-750, F-53 Motorhome Chassis,...
- Certain 2021-2022 Model Year Econoline, Super Duty Chassis Cab, F53 Motor Home, F59 Step Van, and...
- The Service Awareness Newsletter is an informal communication that contains information that may not be...
- Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P21DD, P20BA. P20B9,...
- For 2000-2024 Ford and Lincoln vehicles, swapping a module from a vehicle for diagnosis purposes is likely to
- Various electrical concerns and/or various illuminated warning lamps with various diagnostic trouble codes...
- Communication fault with emissions inspection equipment
- Diagnostic trouble code (DTC) P0000 stored in the powertrain control module (PCM) after an on-demand self test
- Illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0457 stored in the...
- Certain 2020 Model Year Super Duty and 2021 Model Year Medium Duty Vehicles Equipped with a 6.7L Engine...
What 2021 Ford F-750 owners say
Most recent owner complaints, unedited.
Compare the 2021 Ford F-750
Other model years
Questions about the 2021 Ford F-750
Is the 2021 Ford F-750 reliable?
Owners have filed 1 complaint about the 2021 Ford F-750, close to a typical F-750 model year.
What is the most common problem with the 2021 Ford F-750?
Engine and cooling, with 1 complaint.
How many recalls does the 2021 Ford F-750 have?
3 recalls, covering fuel system, diesel and power train.
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