Service bulletins for the 2017 Western Star 4900
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.
670 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Engine are shown. Show all
| CXA 3_25_NOx | 2025-04-02. Other. ENGINE. CX Advocate for NOx conversion low faults |
|---|---|
| CXA 2_25_Turbo Oil Drain | 2025-03-04. Other. ENGINE. CX Advocate for turbo oil drain cracking |
| CXA 2_25_NOx | 2025-03-04. Other. ENGINE. CX Advocate for NOx conversion low faults |
| CXA 1_16_Turbo Oil Drain | 2025-01-29. Other. ENGINE. CX Advocate for turbo oil drain cracking |
| CXA 1_16_NOx | 2025-01-29. Other. ENGINE. CX Advocate for NOx conversion low faults |
| CXA 1_16_GATS2.4 | 2025-01-29. Other. ENGINE. CX Advocate for GATS2.4 being expanding to DD15 |
| CXA 1_16_DD13 Altitude | 2025-01-29. Other. ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault. |
| CXA 1_16_CARB Truck Chec | 2025-01-29. Other. ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| CXA 11_21_CARB Truck Chec | 2024-12-04. Other. ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| WI24-019 | 2024-12-04. Warranty extension. ENGINE. Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates |
| CXA_10_17_CARB Truck Chec | 2024-11-07. Other. ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| SS1023366-Detroit | 2024-11-06. Other. ENGINE. Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines |
| SS1023366-Detroit | 2024-10-04. Other. ENGINE. Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines |
| ICI24-031 | 2024-09-07. Other. ENGINE. Important Campaign Information letter for DDC D23M3 - Campaign Reactivated and Extended. Field Service Campaign D23M3 - GHG17 DETROITTM DD16® Vibration Damper Replacement has been extended for an additional 6 months. |
| CXA 7_24_Oil Suction | 2024-08-02. Other. ENGINE. CX Advocate for Oil Suction manifolds |
| CXA 7_24_NOx | 2024-08-02. Other. ENGINE. CX Advocate for NOx conversion low faults. Update to CXA 6_24_NOx submission. |
| CXA 06_24_NOx | 2024-07-09. Other. ENGINE. CX Advocate communication for NOx conversion low faults |
| VSWP Customer Letter | 2024-06-22. Other. ENGINE. Customer letter regarding variable speed water pump. |
| SS763-WST | 2024-06-05. Other. ENGINE. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller |
| ICI24-006 | 2024-03-06. Service bulletin. ENGINE AND ENGINE COOLING. Important Campaign Information letter for FL974 - Revised Bulletin & Population |
| FL974 | 2024-03-06. Service bulletin. ENGINE AND ENGINE COOLING. Revised Emissions Recall: Cummins DEF Sensor Shortage. REVISION: Some vehicles formerly in Group F have been moved to Group G and have been assigned a new part number as specified in Table 1. An SRT for 'Calibration Code Only: Update or Confirm' has been added, as shown in Table 2, to be used when a new DEF header is not required. There have been some other minor changes to the work instructions and SRT times. |
| FL974 | 2024-02-06. Service bulletin. ENGINE AND ENGINE COOLING. Emissions Recall: Cummins DEF Sensor Shortage |
| SBW49-020 | 2022-03-03. Service bulletin. ENGINE AND ENGINE COOLING. Western Star Service Bulletin for DEF Connector Reinforcement Caps |
| 16TS-08REV | 2021-04-24. Service bulletin. ENGINE AND ENGINE COOLING. Detroit Technical Service Letter for DD13 Cylinder Head and Cylinder Head Gasket Change. |
| WI21-009 | 2021-04-24. Service bulletin. ENGINE AND ENGINE COOLING. Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown. The updated after treatment system (ATS) diesel exhaust fluid (DEF) pump times will be applied to repair orders opened on or after April 12, 2021. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.