2025 Peterbilt 579 technical service bulletins
99 technical service bulletins and manufacturer communications cover the 2025 Peterbilt 579, 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.
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- 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
- Certain chassis with Cummins X15N engines require updated engine harness relays due to the risk of water...
- Updated parts table with new dielectric grease.
- Certain chassis with CARB 2024 compliant MX-13 engines must have the PEU wiring harnesses updated
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
- [SmartAir / KIMS] A/C systems may shut down prematurely when voltage levels drop below a certain threshold.
- KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section
- KW: The chassis list has been updated to include 1 chassis
- 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.
- KW: On certain T680 BEV chassis, installing an updated A/C suction line between the A/C compressor and...
- PB: The chassis list has been updated to include 11 chassis
- The PB chassis list has been updated to include 1 chassis
- The procedure has been updated to include additional steps for verifying the software level on the vehicle...
- When DAVIE version 26.21.2 is used to update the VECU3 to software version 3.4.46.0, the VECU3 5071...
- The verbiage in the Introduction section has been updated.
- This optional software update is expected to be available in late August 2026 for chassis equipped with...
- Chassis list has been updated to include 10 chassis
- For Peterbilt: Chassis list has been updated to include 1 chassis
- Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
- KW -The chassis list has been updated to include 2 chassis
- The chassis list has been updated to include 1 chassis
- An improved transmission bracket is now available for replacement on certain chassis equipped with a...
- This optional software update is expected to be available on 08/07/26 for chassis equipped with EPA 2024...
- Certain unaffected chassis have been removed from the chassis population.
- 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...
- Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson...
- The software is not yet available
- Leveraging PACCAR’s advanced Prognostic prediction algorithms, certain PACCAR MX-11 and MX-13 EMY...
- Leveraging PACCAR’s advanced Prognostic prediction algorithms, certain PACCAR MX-11 and MX-13 EMY...
- An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR...
- Kw & pb
- The currently published HD BEV Chassis with PACCAR EPowertrain Service (Built After 1/14/2026)...
- The repair procedure has been updated to include diagnostic steps.
- The attachment for Eaton bulletin TAIB-1015 has been updated to the latest version to improve process flow.
- KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The...
- Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now...
- KW: A Transmission Control Module (TCM) software update is now available for certain T280, T380, T480,...
- KW: A Transmission Control Module (TCM) software update is now available for certain T680, T880, and W990...
- There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage...
- Troubleshooting procedures for 2.1m cab power windows are now available.
- (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
- Procedures have been updated to include additional truck models in the service intervals table.
- Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s...
- (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation
- The attached procedures document has been updated with more detail and explanations
- Bogie Crossmember Torque Value Update
- Bendix Fusion Camera Parameter Correction
- EMY21-25 ghg
- EPA17-24 mx
- Bulletin Update 03/02/2026
- Sheppard Recall Update March 2026
- Paccar MX-13 VECU3
- Exhaust Stack Isolators
- Engine Air Filter Servicing UPDATE
- One-Piece Aluminum Crossmember Repair
- Procedure pictures updated for clarity
- CARB Label Procedure Update The repair procedure removes the aftermarket change request, adds GHG label...
- Certain Battery Electric Vehicles that are subject to California Air Resources Board (CARB) regulations...
- Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control...
- Repair procedures and warranty information for model 520EV are now available
- Repair procedures and warranty information for model 520EV are now available
- All parts necessary to complete Phase 2 of
- 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
- All EMUX retrofit procedures updated to make it clear that the VECU3 must have software updated and...
- Newly designed fuel injectors are available for EPA2021 compliant PACCAR MX-series engines to optimize...
- 5/29/2025: A new Ethernet Multiplexed Architecture (EMUX) Service Tool Kit service manual (SM034-022) has...
- Sudden loss of high voltage power with unintended opening of electrical contractors, which may occur...
- 4/29/2025
- Due to parts availability issues,
- Safety Recall – Interim Notification Certain Battery Electric Vehicle (BEV) chassis equipped with certain...
- Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash...
- Campaign An MX-13 CARB Software update is available to improve reliability and uptime
- Safety Recall Updated software and procedures are now available
- Some 579EV and 520EV BEV trucks may have loose or improperly torqued ESS gland nuts
- Emissions Campaign Engine Model Year 2024 may not be displayed correctly on the PACCAR MX Engine Label
- Safety Recall Reference Cummins Safety Recall C7083 Cummins alerted Peterbilt to a defect which relates to...
- TCS case requirements for EMUX software and PACCAR MX Pack 2 injector upfit have been removed
- E322 - EMY2024 carb mx
- Fix-as-fail
- Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture...
- BEV Phase 2 tools have been added to the BEV required tools lists.
- This bulletin contains secondary inspection procedures and part replacement procedures for tie-rods...
- Safety recall
- Safety Recall Certain model year 2025 Peterbilt 220, 536, 537, 548, 567, 579, and 589 chassis may have a...
- Information Only Vehicles equipped with Digital Vision System (DVS) Mirror Mounted Cameras, that do not...
- CARB Emission s Manufacturer Warranty term and/or kilometers conversion displayed in certain EMY 2022-2023...
- This Bulletin contains parts ordering and replacement procedures for Steering Gears identified as SUSPECT...
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