TSB: OSHKOSH OSHKOSH, S-SERIES (2020–2022)

Bulletin FDM-TSIB-028 — June 29, 2021

Bulletin Details

Bulletin IDFDM-TSIB-028
ManufacturerOSHKOSH
ModelsOSHKOSH, S-SERIES
Model Years2020–2022
Date IssuedJune 29, 2021
Date Added to NHTSAMay 3, 2022
ComponentELECTRICAL SYSTEM
Vehicles Affected8 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

The following procedure provides instruction for Fleet Managers to access their vehicle system to change parameters.

Affected Vehicles

MakeModelYearComponent
OSHKOSH S-SERIES 2022 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
OSHKOSH S-SERIES 2022 110000 ELECTRICAL SYSTEM
OSHKOSH S-SERIES 2022 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
OSHKOSH S-SERIES 2021 110000 ELECTRICAL SYSTEM
OSHKOSH S-SERIES 2021 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
OSHKOSH S-SERIES 2020 110000 ELECTRICAL SYSTEM
OSHKOSH S-SERIES 2020 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
OSHKOSH OSHKOSH 110000 ELECTRICAL SYSTEM

Related OSHKOSH Recalls

CampaignModelYearComponentSummary
NGDV ELECTRIC 2025 ELECTRICAL SYSTEM:PROPULSION SYSTEM:F... Oshkosh Corporation (Oshkosh Defense) is recalling certain 2025 NGDV battery ...
NGDV 2026 SERVICE BRAKES, HYDRAULIC:PEDALS AND ... Oshkosh Corporation (Oshkosh Defense) is recalling certain 2025-2026 NGDV veh...
NGDV ELECTRIC 2026 SERVICE BRAKES, HYDRAULIC:PEDALS AND ... Oshkosh Corporation (Oshkosh Defense) is recalling certain 2025-2026 NGDV veh...
NGDV ELECTRIC 2025 SERVICE BRAKES, HYDRAULIC:PEDALS AND ... Oshkosh Corporation (Oshkosh Defense) is recalling certain 2025-2026 NGDV veh...
NGDV 2025 SERVICE BRAKES, HYDRAULIC:PEDALS AND ... Oshkosh Corporation (Oshkosh Defense) is recalling certain 2025-2026 NGDV veh...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized OSHKOSH dealer. Bring this bulletin ID (FDM-TSIB-028) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.