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Service bulletins for the 2026 Kenworth T880

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

47 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
E3282026-09-23. Service campaign. ELECTRICAL SYSTEM. Certain chassis with CARB 2024 compliant MX-13 engines must have the PEU wiring harnesses updated. The original wiring and fuse are insufficient for electrical system operation and protection.
01-0942026-09-23. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. [SmartAir / KIMS] A/C systems may shut down prematurely when voltage levels drop below a certain threshold.
46-0292026-08-20. Service bulletin. ELECTRICAL SYSTEM. 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.
43-0892026-07-22. Service bulletin. ENGINE; ELECTRICAL SYSTEM. An optional software update is expected to be available on or after 07/31/26 for chassis equipped with EPA 2024 engine model year (EMY) 2024-2026 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
46-0272026-06-17. Service bulletin. ELECTRICAL SYSTEM. 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.
R26012026-06-04. Service bulletin. ELECTRICAL SYSTEM. Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now available for installation.
02-1772026-06-03. Service bulletin. ELECTRICAL SYSTEM. Troubleshooting procedures for 2.1m cab power windows are now available.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.