2021 Ford F-350 SD, 2021 Ford F-450 SD, 2021 Ford F-550 SD and 1 other model Recall: Front wheel hub extenders may be improperly attached to the front rotor…
NHTSA campaign 21V390000 · Power Train · filed May 25, 2021 · verified Jul 30, 2026
The defect
Ford Motor Company (Ford) is recalling certain 2021 F-350, F-450, F-550, and F-600 vehicles equipped with dual rear wheels and front wheel hub extenders. The front wheel hub extenders may be improperly attached to the front rotor hub assemblies, which could result in separation of the wheels and wheel extenders from the vehicle.
The risk
A detached wheel and wheel extender can increase the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Owners are instructed not to drive their vehicles until the torque of the wheel extender nuts can be verified. Dealers will inspect and tighten the front wheel hub extender nuts, free of charge. Owner notification letters were mailed on June 18, 2021. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 21S26.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
Related recalls
More Ford F-350 SD recalls
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Other campaigns involving Ford vehicles
Source: NHTSA recall database, campaign 21V390000 (manufacturer number 21S26). Data last verified Jul 30, 2026.