2021 Ford F-350 SD problems, from the federal record
Owners of the 2021 Ford F-350 SD have filed 93 complaints with NHTSA, and the vehicle has 14 safety recall campaigns on file. The most-reported problem areas: fuel system (diesel) (22), engine (14), electrical system (13).
Source: NHTSA complaint and recall databases, last verified August 4, 2026. Complaints are unverified owner self-reports; volume is a signal, not a verdict, and popular models draw more complaints because more are on the road.
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Safety recalls (14)
Campaigns NHTSA lists for the 2021 Ford F-350 SD. Whether your specific vehicle is included depends on your VIN; recall repairs are free at the dealer.