2023 Kenworth W900 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Oct 13, 2026 Service bulletinDue to supplier constraints, an authorized aftermarket surge tank has been made available.
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Aug 13, 2026 Service bulletinThe verbiage in the Introduction section has been updated.
• Apr 16, 2026 Service bulletinBogie Crossmember Torque Value Update
• Apr 4, 2026 EmissionsEMY21-25 ghg
• Mar 3, 2026 Service bulletinSheppard Recall Order Process Update
• Jan 31, 2026 Service bulletinProcedure pictures updated for clarity
• Dec 31, 2025 Service bulletinCertain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis...
• Oct 28, 2025 Service bulletinSafety recall
• Apr 9, 2024 Service bulletinCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
• Mar 1, 2024 Service bulletinSafety Recall Repair parts and procedures are now available
• Nov 28, 2023 Service bulletinSafety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900...
• Jun 28, 2023 Service bulletinFix-as-fail
• Mar 31, 2023 Service bulletinPACCAR will reimburse customers for the local purchase of in-tank fuel additive for EPA2021 compliant MX...
• Oct 18, 2022 Service bulletinInfo Only
• Aug 3, 2022 Service bulletinKenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid...
• Jul 22, 2022 Service bulletin​Chassis were shipped without door stop plates installed due to a supplier shortage
• May 19, 2022 Service bulletinCertain T680 NextGen chassis equipped with an RCX230 Horton fan clutch and a Cummins X15 engine are...
• May 19, 2022 Service bulletinNfo only –