2020–2021 Oshkosh S-Series Recall: A machining defect may cause pressure to build in the power steering pump…
NHTSA campaign 21V851000 · Steering · filed Nov 2, 2021 · verified Jul 30, 2026
The defect
Oshkosh Corporation (Oshkosh) is recalling certain 2020-2021 S-Series vehicles. A machining defect may cause pressure to build in the power steering pump and break the shaft seal, resulting in a loss of power steering assist.
The risk
A loss of power steering assist increases 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 will inspect and replace the power steering pump as necessary. Owners may perform this work themselves or reach out to one of our service centers to perform the inspection and repair work free of charge. Owner notification letters were mailed on December 15, 2021. Owners may contact Oshkosh customer service at 1-888-686-7278.
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 Oshkosh S-Series recalls
- 2024–2025 Oshkosh S-Series — Front axle housing wall thickness may not be sufficient and…
- 2022–2024 Oshkosh S-Series — Throttle pedal assembly may contain an oversized magnet…
- 2019–2022 Oshkosh S-Series — Incorrectly installed alternator electrical cable clamps…
- 2019–2022 Oshkosh S-Series — U-bolts securing the front axle may fail
- 2019–2022 Oshkosh S-Series — Fuel tubes between the fuel rail and the injector for…
Other campaigns involving Oshkosh vehicles
Source: NHTSA recall database, campaign 21V851000. Data last verified Jul 30, 2026.