2021 Ford F-350 SD

96 complaints on file, page 1 of 5.

1. Filed Sep 3, 2026Failure Jul 26, 2026La Porte, TXFuel/propulsion system

   The high pressure fuel pump failed sending metal shavings through out the entire fuel system. I had no heads up and the failure left me stranded on top of a bridge. I called 911 twice and finally the cops showed up and wrecker towed me off the bridge. Ford is aware of this known issue with this make and model, and even put a recall partial recall / quick fix to increase the flow around the pump to keep it cooler. I had the quick fix recall completed but it did not prevent the failure and me being stranded on a bridge.

   NHTSA complaint 11761855
2. Filed Aug 19, 2026Failure Aug 2, 202630,000 milesNampa, IDFuel system, Diesel

   The contact owns a 2021 Ford F-350 SD. The contact received notification of NHTSA Campaign Number: 24V957000 (Fuel System, Diesel). The contact stated that while driving 20 MPH, the message "Reduced Power" was displayed, and the check engine warning light was illuminated. The vehicle stalled and failed to restart. The vehicle was towed to a dealer and was diagnosed with failures of the CP4 fuel pump, cycloid filters, and contamination of the entire fuel system. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 30,000.

   NHTSA complaint 11757987
3. Filed Aug 6, 2026Failure Jul 24, 2026Bremerton, WAFuel/propulsion system

   Vehicle went into limp mode and we towed it to the dealership. They ran diagnostics and found that the fuel filter was causing a fault for water in the fuel filter. They replaced the fuel filter and ran diagnostics again and it flagged failure for Low pressure fuel pump. They replaced the low pressure fuel pump and reran diagnostics. When they reran diagnostics it flagged for High pressure fuel pump failure and now they are in the process of tearing it down to the point of failure to find out the cause. My vehicles vin was not included in the original recall and believe that it should have been included.

   NHTSA complaint 11755333
4. Filed Jul 8, 2026Failure Jul 1, 2026Carlton, MNElectrical system

   I was driving my truck home when it completely shut off, I lost all power to everything, including the power steering brakes. When I got home, I did some research on the Internet to see possible causes. Apparently there is a service bulletin for the fuse box having water getting into it from the cowl of the hood, which states it can do exactly what happened to my truck? You can also keep your truck running and not shutting off and just to hold host of other safety issues with the service bulletin. . So I brought my truck in to get diagnosed by Ford and they did indeed say it was the fuse box under the hood that got water into it and shorted it out. Ford would not cover this part even though I have a factory extended warranty, annoying this is a common issue for 2020 to 2022 Ford trucks they issued a recall on expeditions in a couple other vehicles, but not Ford trucks specifically the super duties. How is this? OK that they don’t tell a customer who purchased a vehicle that this could potentially happen and then when it happens, they refuse to cover anything even though it’s their fault why it happened.

   NHTSA complaint 11749077
5. Filed Jun 11, 2026Failure Jun 5, 2026195,000 milesAustin, TXFuel system, Diesel

   The contact owns a 2021 Ford F-350. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. The vehicle was driven to the shoulder of the road, where it lost motive power. The message "Reduced Engine Power" was displayed, and the check engine warning light was illuminated. The contact stated that the failure occurred while a fifth wheel RV was hitched to the vehicle. The vehicle was towed to the dealer, where it was diagnosed that the high-pressure fuel pump had failed and needed to be replaced. The vehicle was not repaired. The contact was informed that the manufacturer denied covering the repair under NHTSA Campaign Number: 24V957000 (Fuel System, Diesel) due to a contaminated fuel system; however, the dealer confirmed that the fuel system was not contaminated. The dealer submitted information to the manufacturer advising that the fuel system was not contaminated. Additionally, a case was filed; however, the contact was denied coverage. The failure mileage was approximately 195,000.

   NHTSA complaint 11743498
6. Filed May 1, 2026Failure Apr 9, 2026Fritch, TXFuel/propulsion system

   Vehicle Safety Complaint – 2021 Ford F-350 I am submitting this complaint regarding a safety-related failure involving my 2021 Ford F-350. While driving under normal conditions, the vehicle suddenly entered “limp mode,” resulting in a significant and immediate loss of power. Approximately 20 miles later, the vehicle completely shut down, leaving me stranded and requiring the truck to be towed to Gene Messer Ford for diagnosis and repair. The failure created a potentially dangerous situation, as the loss of power limited my ability to maintain safe speeds and respond to surrounding traffic conditions. After the vehicle was delivered to the dealership, it took approximately one week for inspection and an additional two weeks to complete repairs. During the repair process, I was informed that newly installed components—including the fuel rail and two fuel injectors—were defective and required replacement again. This raises concerns about whether the root cause of the failure was properly identified and whether contamination or systemic failure within the fuel system was present. I am also aware of widely reported issues involving high-pressure fuel pump (HPFP) failures in Ford diesel engines, which can result in catastrophic damage to the entire fuel system, including injectors, fuel rails, and lines. Given the nature of my vehicle’s failure and the components involved, I am concerned that this incident may be related to a broader, known defect. This type of failure—sudden loss of power followed by complete shutdown—poses a serious safety risk, particularly if it occurs at highway speeds or in high-traffic conditions. I am requesting that this complaint be reviewed as part of a broader investigation into potential fuel system defects in Ford diesel trucks. I believe this issue may warrant further scrutiny and possible recall action to prevent similar incidents.

   NHTSA complaint 11735094
7. Filed Apr 8, 2026Failure Dec 31, 1969Hempstead, TXFuel/propulsion system

   Repair remedy has not been addressed. Leaving the vehicle owners footing the bill when a fuel system problem arises. It's been since 2024 and FMC has not done anything about it. Dec 20,2024 Manufacturer Recall Number24S78 NHTSA Recall Number24V957 Recall StatusRecall Incomplete, remedy not yet available Summary YOUR VEHICLES HIGH-PRESSURE FUEL PUMP MAY FAIL, WHICH MAY RESULT IN EXTENDED CRANKING WITHOUT STARTING WHILE THE VEHICLE IS PARKED, ANDOR A LOSS OF MOTIVE POWER WHILE DRIVING. PRIOR TO LOSS OF MOTIVE POWER YOU MAY EXPERIENCE A CHECK ENGINE LIGHT, NOISE, ANDOR REDUCED ENGINE PERFORMANCE. Safety Risk A LOSS OF MOTIVE POWER INCREASES THE RISK OF A CRASH. Remedy PARTS AND SOFTWARE ARE NOT AVAILABLE TO REPAIR YOUR VEHICLE. FORD MOTOR COMPANY HAS AUTHORIZED YOUR DEALER TO UPDATE THE POWERTRAIN CONTROL MODULE PCM AND THE TRANSMISSION CONTROL MODULE TCM SOFTWARE, AND TO CHECK FOR THE PRESENCE OF CERTAIN DIAGNOSTICS TROUBLE CODES DTCS IN THE PCM WHICH COULD LEAD TO ADDITIONAL DIAGNOSTICS, FREE OF CHARGE. Manufacturer's Notes IF YOU HAVE ANY QUESTIONS REGARDING THIS RECALL, OR BELIEVE ANY OF THIS INFORMATION IS INACCURATE, PLEASE CONTACT FORD DIRECTLY AT 800-392-3673 OR LINCOLN AT 800-521-4140. If the manufacturer has failed or is unable to remedy this safety recall for your vehicle in a timely manner, please contact the NHTSA Vehicle Safety Hotline at: 1-888-327-4236 or TTY: 1-888-275-9171 or file an online complaint with NHTSA.

   NHTSA complaint 11729913
8. Filed Apr 7, 2026Failure Jan 31, 2026110,000 milesBakes Lakes, FLBack over prevention

   The contact owns a 2021 Ford F-350. The contact stated that the back over prevention camera had been inoperable since purchasing the vehicle. The contact had received notification of NHTSA Campaign Number: 25V048000 (BACK OVER PREVENTION); however, the VIN tool showed no open recall. 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 failure mileage was 110,000.

   NHTSA complaint 11729638
9. Filed Mar 12, 2026Failure Dec 20, 2024West Point, UTFuel system, Diesel

   The contact owns a 2021 Ford F-350. The contact received notification of NHTSA Campaign Number: 24V957000 (Fuel System, Diesel). The contact recently set an appointment with a local dealer for the software update, but was informed by the dealer that the recall had been placed on hold. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not informed. The contact had not experienced a failure.

   NHTSA complaint 11723788
10. Filed Feb 23, 2026Failure Feb 23, 2026125,000 milesElliotsburg, INFuel system, Diesel

    The contact owns a 2021 Ford F-350. The contact stated that while driving approximately 65 MPH, the vehicle lost automotive power. The low power mode warning light was illuminated. 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 vehicle was taken to a dealer, where it was diagnosed, and determined that a software update was needed; however, the software update was not available. The vehicle was not repaired. 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 and stated that there was no estimate for when the remedy would be available. The failure mileage was approximately 125,000.

    NHTSA complaint 11720003
11. Filed Feb 23, 2026Failure Jan 15, 2026129,000 milesVallejo, CABack over prevention, Fuel system, Gasoline

    The contact owns a 2021 Ford F-350. The contact received notifications of NHTSA Campaign Numbers: 25V686000 (Back Over Prevention) and 24V957000 (Fuel System, Diesel); however, the parts to do the recall repairs were not yet available. The contact stated that while driving at an undisclosed speed, the vehicle stalled while the accelerator pedal was depressed. Additionally, while in reverse, the image displayed was blurry. The vehicle was towed to a local dealer; however, the vehicle was not repaired because parts were not available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 129,000.

    NHTSA complaint 11719967
12. Filed Feb 20, 2026Failure Feb 13, 202692,567 milesPeculiar, MOUrea injection system (def)

    The contact owns a 2021 Ford F-350. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle was taken to the local dealer who diagnosed that the DEF Pump, DEF Pump Lines needed, and DEF heater element needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 92,567.

    NHTSA complaint 11719362
13. Filed Feb 19, 2026Failure Feb 5, 2026Cleveland, TXEngine

    Cold side intercooler boost tube cracked due to constant vibration impact from coolant overflow hose routed directly above and on top of it. Part and vehicle is available for inspection. The split in the boost hose caused me to loose power while attempting to merge onto a road, almost being hit by another vehicle. After research there are multiple other instances of complaints of the same thing happening to others and multiple aftermarket manufacturers producing replacement and upgraded parts with references and warnings of the same thing happening for the last 10 years. No warning lamps or symptoms prior to failure. After failure no warning lamps but could hear an audible hiss. The vehicle has not yet been inspected by the dealer or police. I was told by their parts people it is a regular failure and the part costs typically around $200 and they only sold it as a full part and not just the rubber replacement hose althought they are separate parts connected with hose clamps.

    NHTSA complaint 11719097
14. Filed Feb 16, 2026Failure Sep 4, 2025Dripping Springs, TXEngine, Fuel/propulsion system, Unknown or other

    Driving and abrupt transmission shifting issues.

    NHTSA complaint 11718342
15. Filed Dec 10, 2025Failure Dec 10, 2025Henderson, IAFuel system, Diesel

    The contact owns a 2021 Ford F-350. The contact received a recall letter related to NHTSA Campaign Number: 24V957000 (Fuel System, Diesel). The contact was concerned about being involved in a crash. The local dealer was contacted and confirmed that the software fix was not available. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The contact did not experience a failure.

    NHTSA complaint 11704259
16. Filed Dec 8, 2025Failure Nov 19, 2025Pittsburg, CAElectrical system

    See attached document for complaint.

    NHTSA complaint 11703738
17. Filed Dec 1, 2025Failure Nov 19, 2025Fort Worth, TXEngine, Fuel/propulsion systemFire

    On 11/19/25 , my 2021 Ford f350 burned to the ground due to engine malfunction. From what the fire department said.

    NHTSA complaint 11702165
18. Filed Nov 5, 2025Failure Nov 4, 2025132,900 milesLincoln, CAFuel system, Diesel

    The contact owns a 2021 Ford F-350. 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 contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at an undisclosed speed with the cruise control activated, the contact heard an abnormally loud popping and clicking sound. The check engine warning light was illuminated. The message "Decreased Engine Power" was displayed, and the vehicle experienced a loss of drive power. The contact coasted off the road and came to a complete stop. The message "Shift to Neutral" was displayed. The contact turned off the vehicle and let it cool down for five minutes. The vehicle failed to restart. The vehicle was towed to an independent mechanic, who determined that the high-pressure fuel pump had failed. The dealer was made aware of the failure but confirmed that parts were not yet available. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 132,900.

    NHTSA complaint 11697690
19. Filed Oct 3, 2025Failure Aug 1, 202544,000 milesInver Grove Heights, MNService brakes

    The contact owns a 2021 Ford F-350. The contact stated that while driving at speeds above 40 MPH and attempting to depress the brake pedal, the vehicle slid and drifted to the right. There was no warning light illuminated. The vehicle was taken to a local dealer where it was diagnosed, and the contact was informed that the grease pins needed to be greased. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 44,000.

    NHTSA complaint 11691277
20. Filed Sep 30, 2025Failure Sep 30, 2025New Braunfels, TXFuel system, Diesel

    The contact owns a 2021 Ford F-350. 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 not made aware of the issue. The contact had not experienced a failure.

    NHTSA complaint 11690536