AI Damage2021 Ford F-450 SD: common problems
The maker issued 237 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 237
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Powertrain | 0 | 0 | 66 |
| Electrical system | 0 | 0 | 60 |
| Equipment | 0 | 0 | 46 |
| Engine and cooling | 0 | 0 | 30 |
| Engine | 0 | 0 | 19 |
| Fuel system | 0 | 0 | 10 |
| Structure | 0 | 0 | 10 |
| Service brakes | 0 | 0 | 6 |
| Backover prevention | 0 | 0 | 5 |
| Communication | 0 | 0 | 4 |
| Lane departure | 0 | 0 | 4 |
| Latches, locks, linkages | 0 | 0 | 4 |
| Steering | 0 | 0 | 4 |
| Visibility | 0 | 0 | 4 |
Comparison
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- For 20202026 vehicles equipped with the 10R140 transmission, a new Transmission Clutch Circuit Leak…
For 20202026 vehicles equipped with the 10R140 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum…
- Reason for update
update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt washers, and part number change of the fluid pan from the Parts List. Reissued 01-Oct-2026…
- Customer Satisfaction Program 25M01 Certain 2021 Model Year F-150 3.0L Diesel Engine and 2020-2022 Model…
Customer Satisfaction Program 25M01 Certain 2021 Model Year F-150 3.0L Diesel Engine and 2020-2022 Model Year Super Duty with 6.7L Diesel Engine Nitrogen Oxide (NOx) Sensor Replacement, If Required After Dealer…
- Certain 2017-2025 F-450 – F-600 Chassis Cab Upfitted with an Aerial Bucket Frame Rail Crack
- This article supersedes TSB 25-2572 to update the Parts List to correct the part number LC3Z-6006-L to…
This article supersedes TSB 25-2572 to update the Parts List to correct the part number LC3Z-6006-L to LC3Z-6781-A, remove the flex plate bolts AL3Z-6379-BA from the parts list as these bolts are in kit LC3Z-6781-A…
- Reason for update
To add 2020 model year chassis cab vehicles. Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0420…
- Various 2020-2026 Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may…
Various 2020-2026 Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument…
- Some 2021-2026 F-150 vehicles equipped with a 5.0L/5.2L engine, 2021-2025 F-Super Duty/F-53 Motorhome/F59…
Some 2021-2026 F-150 vehicles equipped with a 5.0L/5.2L engine, 2021-2025 F-Super Duty/F-53 Motorhome/F59 Commercial Stripped Chassis vehicles equipped with a 6.8L/7.3L engine and 2021-2025 E-Series/F-650/F-750…
- Advance Notice – Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines…
Advance Notice – Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Required After Dealer Evaluation
- This article supersedes TSB 24-2249 to update the claim quantity of the torque converter nuts, part number…
This article supersedes TSB 24-2249 to update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt washers, and part number change of the fluid pan from the…
- Certain 2017-2025 F-450 – F-600 Super Duty Chassis Cab Upfitted with an Aerial Bucket Frame Rail Crack
- Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various connectivity concerns…
Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various connectivity concerns with The Ford App Lincoln App including but not limited to: missing activation prompt pop-upon the vehicle's…
NHTSA lists 237 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Ford F-450 SD?
There are no owner complaints in the NHTSA data for this year; the data comes from 237 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Ford F-450 SD?
NHTSA lists 237 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Ford F-450 SD from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.