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Service bulletins for the 2014 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.

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

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
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
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
0105-152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 0105-15 SPN 102 (MCM) (GHG14)
0108-152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 0108-15 SPN 1323 through 1328 (MCM) (GHG14)
0104-152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 0104-15 SPN 3464/ FMI 16, 18 (MCM) (GHG14)
0101-152018-06-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0101-15 SPN 4364 (ACM) (EPA10)
18SP6872018-06-25. Service bulletin. ENGINE AND ENGINE COOLING. 18SP687 DD15 16 EGR Actuator Replacement
sbw20182018-06-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. sbw2018 Western Star 4800 and 4900 Radiator Mounting
0315-172018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. GHG14 - Intake Manifold Pressure Too Low
0314-172018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. GHG14 Intake Manifold Pressure Too Low
0303-172018-06-18. Service bulletin. ENGINE. (CPC)(EPA10-GHG14) and SPN 98 (CPC)(GHG17)
0301-172018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0301-17 Contaminated Fluids
418-132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); ELECTRICAL SYSTEM. 418-13 SPN 2791-FMI 12 - GHG14
414-132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 414-13 Removal and Installation of the GHG14 13 and 23 Gallon Diesel Exhaust Fluid Tank Header Unit
413-132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 413-13 GHG14 13 and 23 Gallon Diesel Exhaust Fluid Tank
407-132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 407-13 EGR Actuator Slow Learn
711-132018-06-18. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 711-13 SPN 100-FMI 4 - ALL YEARS
717-132018-06-18. Service bulletin. EQUIPMENT; ENGINE; EQUIPMENT:MECHANICAL; EQUIPMENT ADAPTIVE/MOBILITY. 717-13 Oil Pan
0202-172018-06-18. Service bulletin. ENGINE. 0202-17 DD13, DD15, and DD16 Cylinder Head Assembly Removal and Installation
304-152018-06-18. Service bulletin. EQUIPMENT; ENGINE. 304-15 Diagnostic Tests
303-152018-06-18. Service bulletin. ENGINE. 303-15 Contaminated Fluids
308-152018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE. 308-15 Symptom Diagnostics - Oil Present at the Turbocharger Compressor

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