Service bulletins for the 2025 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.
84 on file from NHTSA, as of 2026-10-19.
By type
By component
By topic
| E322 - KW | 2025-02-05. Service bulletin. ENGINE; ELECTRICAL SYSTEM. PSB E322: EMY2024 and EMY2025 CARB MX-13 Software Update Campaign Software Update is now available. Engine software must be updated to NA-110C before releasing chassis to final customers. Certain Vehicle Model Year 2025 T680/T880 chassis equipped with Engine Model Year (EMY) 2024 or 2025 CARB MX-13 engines and NA-100C software may experience a Malfunction Indicator Lamp (MIL) due to a software issue. Without this update, a derate may occur. |
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| 24KWK | 2025-01-07. Service bulletin. STEERING. PACCAR 20k Steer Axle Steer Arm and Tie Rod Arm Bolt Torque Interim Safety Recall Certain Kenworth model T480, T800, T880, and W990 equipped with a PACCAR 20k Steer Axle have been identified as having steer arm and/or tie rod arm fasteners that may be improperly torqued and can be at risk of failing. If both fasteners, in either steering arm or tie rod bracket fail, there may be a loss of steering control, which could increase the risk of a crash. At this time, parts are not available to complete the necessary repairs. This bulletin will be updated when parts become available. 12/12/2024 |
| E323 | 2024-12-03. Service bulletin. ENGINE. PACCAR MX EPA24 Phinia Fuel Injector Replacement Certain chassis equipped with PACCAR MX-13, EPA24 engines equipped with fuel injectors that have an increased risk of tips fracturing and causing consequential engine damage. |
| 24KWH | 2024-12-03. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Safety Recall Refer to Cummins Safety Recall (Campaign) C7083. Cummins alerted Kenworth to a defect which relates to motor vehicle safety in certain Cummins X15 engines equipped with certain fuel pumps. Refer to Cummins Safety Recall (Campaign) C7083 for repair information. |
| E322 | 2024-12-02. Service bulletin. ENGINE. PSB E322: EMY2024 CARB MX-13 Software Update Campaign – Interim Notification Certain model year 2025 T680/T880 chassis equipped with EMY2024 CARB MX-13 engines and NA-100C software may experience a Malfunction Indicator Lamp (MIL) due to a software issue. If ignored, a derate may occur. This bulletin will be updated once software is available. |
| 24KWF | 2024-08-02. Service bulletin. STEERING. SAFETY RECALL Repair parts and procedures are now available. Certain Kenworth vehicles from model year 2025 may contain steering gear(s) with a sector shaft that may not meet hardness requirements for the gear teeth due to improper heat-treating during assembly. Sector shaft gear teeth with lower than required hardness may prematurely wear, crack, or fracture. A fractured gear tooth may interfere with the gear mechanism leading to binding which in turn may increase the likelihood of a crash. |
| 24KWF | 2024-05-04. Service bulletin. STEERING. Certain Kenworth vehicles from model year 2025 may contain steering gear(s) with a sector shaft that may not meet hardness requirements for the gear teeth due to improper heat treating during assembly. Sector shaft gear teeth with lower than required hardness may prematurely wear, crack, or fracture. A fractured gear tooth may interfere with the gear mechanism leading to binding which in turn may increase the likelihood of a crash. This bulletin will be updated when repair parts and procedures are available. |
| 24KWE | 2024-04-03. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Safety Recall – INTERIM NOTIFICATION Parts are not currently available for this safety recall. This bulletin will be updated once repair parts are available. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the transmission may result in the vehicle becoming disabled after it comes to a stop thereby increasing the risk of crash or injury. A transmission fault will appear on the dash display if communication is lost. |
| 24KWC | 2024-03-04. Service bulletin. STEERING. Safety Recall Inspection procedures are available. Steering gear serial numbers must be inspected to determine suspect gears. Certain steering gears may have been assembled incorrectly, causing the gear to fracture. This can cause a loss of steering control, increasing the risk of a crash. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.