2020–2021 Oshkosh S-Series Recall: Rear axle output shaft may not have been heat-treated properly, which…
NHTSA campaign 21V125000 · Power Train · filed Feb 26, 2021 · verified Jul 30, 2026
The defect
Oshkosh Corporation (Oshkosh) is recalling certain 2020-2021 S-Series vehicles. The rear axle output shaft may not have been heat-treated properly, which could cause the shaft to fracture.
The risk
A fractured rear output shaft may cause the shaft or interaxle driveline to detach from the vehicle, increasing the risk of a crash or injury.
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
Oshkosh will notify owners, and owners will be instructed to inspect the output shaft, and if necessary, order a new one and replace it, free of charge. The recall began on March 31, 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.safercar.gov.
Affected vehicles
Related recalls
More Oshkosh S-Series recalls
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- 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 21V125000. Data last verified Jul 30, 2026.