2025 Kenworth L770 technical service bulletins
26 technical service bulletins and manufacturer communications cover the 2025 Kenworth L770, including one warranty extension.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- 32 fuel injector part numbers (16 for MX-11 and 16 for MX-13) have been added to this warranty policy.
- There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage...
- Eaton service bulletin TAIB-1026 instructs dealers to update the master switch module (MSM) software
- Removed hyperlinks for bulletin migration
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section
- This optional software update is expected to be available after 08/28/2026.
- The procedure has been updated to include additional steps for verifying the software level on the vehicle...
- This optional software update is expected to be available in late August 2026 for chassis equipped with...
- Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
- This optional software update is expected to be available on 08/07/26 for chassis equipped with EPA 2024...
- An optional software update is expected to be available on or after 07/31/26 for chassis equipped with EPA...
- This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and...
- The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to...
- The software is not yet available
- An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR...
- There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage...
- EPA17-24 mx
- Sheppard Recall Update March 2026
- Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the...
- Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control...
- Procedures are now available for Phase 1 chassis equipped with Internal Combustion Engines (ICE) and...
- A required spacer tool set is now available to streamline the injector replacement process
- Safety Recall Inspection procedures are available
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