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Service bulletins for the 2011 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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
0609-172019-03-25. Service bulletin. EQUIPMENT; ENGINE. SPN 3226 (ACM) (GHG17)
0602-172019-03-25. Service bulletin. ENGINE. Cylinder Liner - Testing of the Cylinder Liner Upper O-Ring
17-0232019-02-19. Service bulletin. ENGINE. New Detroit Diesel Cylinder Liner Upper O-Ring Leak Test Standard Repair Time
0903-172019-02-19. Service bulletin. ENGINE. Engine Manufacturer Diagnostics
Aftertreamtent F2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT. Service Information Bulletin for Aftertreamtent Failure Guide
sbw8329 HVAC Fre2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. Service Solution for HVAC Fresh Air Intake Water Leak in certaian Western Star models-4700, 4900, and 5700
sbw8329 HVAC Fre2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Service Bulletin: HVAC Fresh Air Intake Water Leak
0505-182018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low
0505-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low
0312-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT. 0312-18 Installation Output Shaft Seal
0311-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT. 0311-18 Installation of the Main Shaft Speed Sensor
0401-182018-10-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0401-18 SPN 1231 (MCM) (EPA10 GHG14)
531-132018-06-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. 531-13 GHG14 DD15 Asymmetrical Turbocharger
528-132018-06-25. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 528-13 SPN 3246-FMI 0 - EPA10 - GHG14
527-132018-06-25. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. 527-13 SPN 190-FMI 15,17 GHG14
520-132018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 520-13 Cylinder Block
518-132018-06-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT; FUEL SYSTEM, DIESEL. 518-13 SPN 4334-FMI 4 - GHG14
13TS172018-06-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. 13TS17 EPA10-GHG14 Diesel Exhaust Fluid (DEF) in Fuel System-Diesel Fuel in DEF System Contamination
13TS152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 13TS15 EPA10 Diesel Oxidation Catalyst (DOC) Face Plugging And Code SPN 3251-FMI2 - DOC Inlet Pressure Sensor Not Plausible
13TS302018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. GHG14 DD Engine EGR System Fault Codes
13TS282018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. GHG14 472906S Turbocharger Compressor Inlet
13TS152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 13TS15Rev EPA10 Diesel Oxidation Catalyst (DOC) Face Plugging And Code SPN 3251/FMI 2 - DOC Inlet Pressure Sensor Not Plausible
15TS42018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 15TS4 EPA07 DD15 Piston Kits
15TS22018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 15TS2 EPA07 and EPA10 DD Platform Engines With Low Oil Pressure Codes
15TS12018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 15TS1 GHG14 DD Platform Engines With Codes SPN: 1323 through SPN: 1328, FMI: 31, Idle Smoothness Control/Cylinder Misfire At Idle

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