RoadVitals

2021 Oshkosh S-Series

Recalls, owner-reported complaints, investigations and safety data

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
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Safety recallsA safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
7
Latest May 26, 2022
InvestigationsNHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
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Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
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Overview

Our database contains no NHTSA owner-reported complaints for the 2021 Oshkosh S-Series. 7 safety recalls have been issued covering this model year; and 27 manufacturer communications are on file.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Safety recalls

7 campaigns cover this model year

View all 7

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
22V378000

ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

May 26, 2022
1,316 units potentially affected
The defect: Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series 2.0 Concrete Mixers. Incorrectly installed alternator electrical cable clamps may rub against the vehicle frame or hydraulic hose, possibly damaging the alternator cables.
The risk: Damaged alternator electrical cables can increase the risk of a fire.
The remedy: Oshkosh will provide instructions on how to inspect the wiring, reposition the clamps, and properly secure the cables. The repair can be performed by the owner or an Oshkosh service center, free of charge. Owner notification letters were mailed on June 23, 2022. Owners may contact Oshkosh's customer service at 1-888-686-7278.
Oshkosh CorporationView on NHTSA.gov
22V008000

FUEL SYSTEM, DIESEL:FUEL INJECTION SYSTEM:FUEL RAIL

Jan 11, 2022
1,608 units potentially affected
The defect: Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. The fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak.
The risk: A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire.
The remedy: On engines with 75 miles or less, dealers will install vibration isolators to the fuel tubes. Engines with more than 75 miles will receive new fuel tubes with vibration isolators. Repairs will be performed free of charge. Owner notification letters are expected to be mailed February 1, 2022. Owners may contact Oshkosh customer service at 1-8088-686-7278.
Oshkosh CorporationView on NHTSA.gov
22V009000

SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE; SUSPENSION:MULTIPLE AXLE

Jan 11, 2022
1,268 units potentially affected
The defect: Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. The u-bolts securing the front axle may fail.
The risk: Bolt failure may allow the front axle to shift or detach, increasing the risk of a crash.
The remedy: Oshkosh will provide new u-bolts, free of charge. Owner notification letters were mailed February 24, 2022. Owners may contact Oshkosh customer service at 1-888-686-7278.
Oshkosh CorporationView on NHTSA.gov

Recent owner complaints

Reports submitted to NHTSA, shown in the owner's own words

No owner complaints recorded for this model year

Either none have been filed with NHTSA, or this vehicle is too new for reports to have accumulated.

Manufacturer communications

A bulletin sent by a manufacturer to its dealers. Not a recall, and repairs are not necessarily free.

FDM-SVC-045

ELECTRICAL SYSTEM

This bulletin provides instructions to install the latest battery disconnect switch on S-Series 2.0 vehicles in serial number range 788727 - 814085.

FDM-SVC-044

This bulletin provides instructions to install a check valve in the chute return hydraulic circuit to prevent fluid back flow through the chute manifold if a chute up or down hose fails, and install a shut-off valve on the fan manifold to turn off flow of hydraulic oil to the chutes and water pump.

FDM-IB-013

This bulletin provides instruction for replacing the existing chute drive washer with a hardened steel washer. This change prolongs the service life of the drive sprocket and chute operation.

FDM-IB-011

ELECTRICAL SYSTEM; ENGINE

This bulletin provides information on verifying powertrain harness grounds are correctly installed, and covers the installation of an optional engine ground cable.

FDM-IB-011

ENGINE

This bulletin provides information on making sure the dedicated ground from the battery negative to the engine block ground stud remains installed when a powertrain harness is replaced. Service personnel have found instances of this ground cable not being reconnected when a powertrain harness has been replaced, this dedicated ground MUST be installed as it was when the vehicle left the factory. Failure to keep the dedicated ground installed could lead to engine failure over time.

FDM-IB-010

This bulletin provides information on installing metal door linkage rod clips in place of original plastic clips.

Manufacturers file copies of the bulletins they send to dealers with NHTSA. These often describe diagnostic or repair procedures for a known condition. They are not recalls: repairs described in a bulletin are usually only free if the vehicle is still under warranty or the manufacturer has extended coverage.

Compare model years

Complaint and recall counts across every year of this model

Oshkosh S-Series by model year
YearComplaintsRecallsInvestigationsIssue Index
2025010—
2024020—
2023010—
2022050—
2021Viewing070—
2020070—
2019060—
2018030—
2017020—
2016030—
2015040—
2014050—
2013030—
2012020—
2011000—
2010000—
2009000—
2008010—
2007110—
2006020—
2005020—
2000110—
1999010—
1998010—
1997010—
1995010—
1994010—
1993010—
1992010—
1991020—
1990010—
1989010—
1988020—
1987020—
1986020—
1985030—
1984040—
1983030—
1982010—
1981010—
1980010—
1979010—
1978010—

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers. Older model years have had longer for reports to accumulate.