2021 Ford F-450 SD Other or unknown Problems
- Complaints
- 3about this part
- Share
- 17%of 18 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the other or unknown of the 2021 Ford F-450 SD, 17% of the 18 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Failure of a $70 thermocouple sensor in the air conditioning unit requires replacement of the entire evaporative cooler, which requires removal and reinstallation of the entire dash from the vehicle. This should be a part serviceable without such extensive work.”
NHTSA complaint #11742943, filed 2026-06Related service bulletins
- 11038166Oct 6, 2026For 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)…
- 11037979Oct 1, 2026This bulletin supersedes 24-2249. Reason for update: update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt…
- 11035635Jul 28, 2026Customer 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…
- 11034214Jun 23, 2026Certain 2017-2025 F-450 – F-600 Chassis Cab Upfitted with an Aerial Bucket Frame Rail Crack
- 11034010Jun 19, 2026This 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…
- 11030282Mar 25, 2026Advance Notice – Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Required After Dealer Evaluation
- 11029052Feb 24, 2026Ford and Lincoln vehicles equipped with wired keyless entry keypad systems and accessory wireless keyless entry keypad systems may or may not come with a wallet card containing…
- 11029724Feb 17, 2026Certain 2017-2025 F-450 – F-600 Super Duty Chassis Cab Upfitted with an Aerial Bucket Frame Rail Crack
- 11026928Dec 2, 2025Special Field Action 25L02 Certain 2017-2024 Model Year California Emissions-Certified Vehicles Transmission Control Assembly Reimbursement
- 11025526Nov 10, 2025Some 2021-2025 Expedition/Navigator/F-150/F-Super Duty/F-53 Motorhome/F59 Commercial Stripped Chassis/F-650/F-750/Transit vehicles equipped with a 2.7L/3.5L (non…
Other or unknown: other model years
Other parts of the 2021 Ford F-450 SD
5 complaintsTransmission and drivetrain
4 complaintsBrakes
3 complaintsFuel system
3 complaintsBody and structure
3 complaintsEngine
2 complaintsLatches, locks and linkages
2 complaintsTires
1 complaints
← All problems reported for the 2021 Ford F-450 SD
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology