No complaints are listed for the 2020 Oshkosh S-Series. NHTSA's API and bulk file list none in this build.
Data build 2026-10-09.
NHTSA lists this vehicle as OSHKOSH S-SERIES.
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
7 recalls.
Date: 2022-05-26. Systems: ELECTRICAL SYSTEM.
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.
Consequence: Damaged alternator electrical cables can increase the risk of a fire.
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.
Do not drive: No. Park outside: No.
Date: 2022-01-11. Systems: SUSPENSION.
Defect: Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. The u-bolts securing the front axle may fail.
Consequence: Bolt failure may allow the front axle to shift or detach, increasing the risk of a crash.
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.
Do not drive: No. Park outside: No.
Date: 2022-01-11. Systems: FUEL SYSTEM, DIESEL.
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.
Consequence: A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire.
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.
Do not drive: No. Park outside: No.
Date: 2021-11-02. Systems: STEERING.
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.
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.
Do not drive: No. Park outside: No.
Date: 2021-06-27. Systems: ELECTRICAL SYSTEM.
Defect: Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. These vehicles were manufactured with 10 amp Anti-Lock Brake System (ABS) fuses, instead of the required 15 amp ABS fuses.
Consequence: The incorrectly sized fuse may blow during an ABS braking event, increasing the risk of a crash.
Remedy: Oshkosh will provide owners new fuses, a new fuse label, and installation instructions, free of charge. Owner notification letters were mailed on July 29, 2021. Owners may contact Oshkosh customer service at 1-888-686-7278.
Do not drive: No. Park outside: No.
Date: 2021-02-26. Systems: POWER TRAIN.
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.
Consequence: 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.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2020-08-24. Systems: EXTERIOR LIGHTING, PARKING BRAKE, SERVICE BRAKES, AIR.
Defect: Oshkosh Corporation (Oshkosh) is recalling certain 2020 S-Series vehicles equipped with Bendix pressure switches. The plastic threads holding the two halves of the pressure switch may strip when the switch is pressurized, resulting in an air leak which, if severe enough, can cause the air system to lose pressure when the brakes are applied. Failure of the front and rear brake switches will also (excerpt)
Consequence: As a result of a pressure switch air leak, the braking distance may be diminished and/or the parking brake may automatically engage. If the vehicle is equipped with an affected brake switch on both the front and the rear brakes and both parts fail, the brake lights may not operate. These conditions may increase the risk of a crash. (excerpt)
Remedy: Oshkosh will notify owners, and dealers will inspect the brake pressure switch and replace it as necessary, free of charge. The recall began September 28, 2020. Owners may contact Oshkosh customer service at 1-888-686-7278. (excerpt)
Do not drive: No. Park outside: No.
Manufacturer communications
36 manufacturer communications.
Communications by system| System | Count |
|---|
| ELECTRICAL SYSTEM | 13 |
|---|
| EQUIPMENT | 10 |
|---|
| UNKNOWN OR OTHER | 7 |
|---|
| POWER TRAIN | 4 |
|---|
| STEERING | 3 |
|---|
| ENGINE | 2 |
|---|
| ENGINE AND ENGINE COOLING | 1 |
|---|
| EQUIPMENT ADAPTIVE/MOBILITY | 1 |
|---|
11037325
Date: 2026-08-18. Type: Other. Systems: UNKNOWN OR OTHER.
This bulletin provides instructions for identifying and locating all driveline grease zerk fittings. Lubrication of the driveline is important for proper vehicle operation.
11033567
Date: 2026-05-13. Type: Other. Systems: 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.
11033568
Date: 2026-03-25. Type: Other. Systems: UNKNOWN OR OTHER.
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.
11033569
Date: 2026-03-01. Type: Other. Systems: UNKNOWN OR OTHER.
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.
11027195
Date: 2025-12-19. Type: Service Bulletin/Repair Instructions. Systems: 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.
11022278
Date: 2025-09-02. Type: Service Bulletin/Repair Instructions. Systems: 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
11022277
Date: 2025-08-20. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.
This bulletin provides information on installing metal door linkage rod clips in place of original plastic clips.
11018853
Date: 2025-06-02. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.
This bulletin provides instruction for replacing a Micronet display with an updated Grayhill overhead display and T27 TCU.
11018857
Date: 2025-05-19. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.
This bulletin provides instruction for installing an updated water meter.
11009675
Date: 2024-10-17. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
This bulletin provides instructions for performing an Over The Air Programming (OTAP) vehicle software update.