Vehicle recall 21V851000 · November 2, 2021
2020-2021 Oshkosh S-Series
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.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Consequence
- A loss of power steering assist increases the risk of a crash.
- Remedy
- 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.
- Notes
- 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.
Recall details
- NHTSA campaign
- 21V851000
- Reported to NHTSA
- November 2, 2021
- Filed by
- Oshkosh Corporation
- Owner notification
- December 13, 2021
- Vehicles potentially affected
- 697
- Initiated by
- the manufacturer
- Components
- Steering › Hydraulic power assist › Pump
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Oshkosh S-Series (2020-2021): 2021, 2020
Has your Oshkosh been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Oshkosh dealer can also check your VIN. Recall repairs are free.