Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
P001
KW: The chassis list has been updated to include 1 chassis. The total chassis count is now 53. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to include 8 chassis. The total chassis count is now 130. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section.
43-089
This optional software update is expected to be available after 08/28/2026.
24KWC/24PBC
Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
46-029
When DAVIE version 26.21.2 is used to update the VECU3 to software version 3.4.46.0, the VECU3 5071 component group may display as --- after programming.
14-037
An improved transmission bracket is now available for replacement on certain chassis equipped with a PACCAR TX-12 transmission, featuring a more durable design for enhanced long-term performance.
41-029
Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson air filter housings.
99-052
There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification information in certain Engine Model Year (EMY) 2026 MX-11 and MX-13 Operator’s Manuals.
T024
KW & PB: New software is available for download. The DAVIE4 cache must be cleared before attempting to reprogram a chassis that is experiencing problems to ensure the latest version of software is installed. Follow all steps in the attached procedures before submitting a TCS case.
46-027
The currently published HD BEV Chassis with PACCAR EPowertrain Service (Built After 1/14/2026) de-energizing Procedures on ServiceNet cannot be utilized for certain pre-production Battery Electric Vehicle (BEV) chassis.
T-024
The repair procedure has been updated to include diagnostic steps.
27-012
The attachment for Eaton bulletin TAIB-1015 has been updated to the latest version to improve process flow.
R2601
Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now available for installation.
02-177
Troubleshooting procedures for 2.1m cab power windows are now available.
43-087
(KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
41-024
Procedures have been updated to include additional truck models in the service intervals table.
45-070
The attached procedures document has been updated with more detail and explanations. This is not a stand-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
14-034
Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values.
E339
EMY25 Engine Label Replacement - (KW) Certain vehicle model year 2026 Kenworth chassis equipped with EMY2025 PACCAR MX engines require a revised engine label update. (PB) Certain vehicle model year 2026 Peterbilt chassis equipped with EMY2025 PACCAR MX engines require a revised engine label update.
E340
KW Certain vehicle model year 2026 Kenworth chassis equipped with EMY2025 PACCAR MX engines require an amended engine label. The engine label is now available for order and installation. PB Certain vehicle model year 2026 Peterbilt chassis equipped with EMY2025 PACCAR MX engines require an amended engine label. The engine label is now available for order and installation.
34-100
Halogen Headlamp Operation -Activating the Flash to Pass system on certain [Kenworth / Peterbilt] vehicles may cause one headlamp to deactivate.
37-004
PACCAR MX-13 VECU3 Software Update - Certain heavy-duty chassis equipped with a PACCAR MX-13 engine are eligible for a Vehicle Electronic Control Unit (VECU3) software update.
43-083
Exhaust Stack Isolators - Early wear of the polyurethane exhaust stack isolators may occur on certain Kenworth chassis due to excessive heat. Early wear of the polyurethane exhaust stack isolators may occur on certain Peterbilt chassis due to excessive heat.
E326
EPA17-24 MX-13 Fuel Injector Connector - This bulletin has been revised to include EPA24 PACCAR MX-13 engines.
12-001
Vehicles equipped with Watson & Chalin 20K AL2200 lift axles may have crossmember fasteners of incorrect grade.
43085
Certain vehicle model year 2026 T880 / W900 / W990 chassis have updated GHG labels available for order and installation.
25PACF
Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013 / Q21-1157-002-002 / Q21-1157-004-004 / Q21-1157-006-006 / Q21-1157-009-009. See attached Parts Matrix for required parts per chassis.
27-011
A transmission control module (TCM) software update is now available for certain T680 / T880 / W900 / W990 chassis with Eaton Endurant transmissions running TCM software version 5516372, where the PTO fails to operate or engage. Please see the attached Eaton bulletin TAIB- 1021 in the Attachments section of this bulletin for complete details.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.