WenmarOpen by Wenmar Pro

Service bulletins for the 2015 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.

617 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
0311-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT. 0311-18 Installation of the Main Shaft Speed Sensor
aeo18M12018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM:SOFTWARE. aeo18M1 GHG14 Heavy Duty Engine Platform Vocational Application Programming
MY18M12018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM:SOFTWARE. MY18M1a 05-MAR-2018 Vocational
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
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
323-152018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; EQUIPMENT. 323-15 Symptom Diagnostics ? Noise
306-152018-06-18. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 306-15 SPN 3246 (ACM)(EPA10;GHG14)
321-152018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 321-15 SPN 4364 (ACM) (GHG14)

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