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Service bulletins for the 2018 Western Star 4800

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.

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

By type

By component

Bulletins, newest first
19-013WI2019-09-05. Service bulletin. EQUIPMENT. Warranty Information Letter to announce addition of Thomas Built Bus as a brand with an Authorized Demonstrator Program
19-010WI2019-09-04. Service bulletin. EQUIPMENT. Warranty Information Letter updated to communicate warranty system updates.
0609-192019-08-08. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL. Service Information Bulletin for Symptom Diagnostics - Fluid in the Aftertreatment - Diesel Fuel Contamination.
0308-19 PTO2019-08-08. Service bulletin. ENGINE AND ENGINE COOLING. Service Information Bulletin regarding PTO Dosing. This feature enables Active Regeneration of the DPFs while in PTO mode.
0305-19 SPN 20002019-08-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Information Bulletin for Communication Loss with a Common Powertrain Controller (CPC) Module (CPC Heartbeat Message is no Longer Arriving)
0607-192019-08-08. Service bulletin. ENGINE AND ENGINE COOLING. Service Information Bulletin to updated the Fuel Injector Harness sections and relocated to Engine Electrical section.
0107-19 GHG172019-08-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); ENGINE AND ENGINE COOLING. Service Bulletin to testing of EGR Cooler Water Manifold Assembly in DD13 engines.
SPN 3563 / FMI 22019-08-08. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. HDEP GHG17 engines are not equipped with turbo wastegates. Steps in this troubleshooting involving wastegates were removed.
19TS-62019-08-08. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. The modified parked regeneration strategy has been standard on GHG17 units since the start of GHG17 production and was added to EPA10 and GHG14 units with a software update. The modified regeneration utilizes an improved strategy to clean the DOC inlet face and reduce downtime due to DOC face plugging.
0419-19SPN5210302019-08-08. Service bulletin. ENGINE AND ENGINE COOLING. Updates to troubleshooting guides in Diagnostic Link with newest version
19TL-92019-08-08. Service bulletin. WHEELS; SUSPENSION; EQUIPMENT. DTNA Special Tools Group has approved the use of Haweka Axis4000 aftermarket alignment system for use on DTNA products at DTNA service locations. The Axis4000 system uses the reference points required by DTNA for precise, accurate, and repeatable measurements. Axis4000 is a sophisticated, user-friendly system that utilizes computer based camera-radio technology and references the center line of the frame for measuring and providing alignment results to DTNA specifications.
18SP730Rev2019-08-08. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
0611-192019-08-08. Service bulletin. FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. Service Information Bulletin was released, to add new procedures to address diagnostics near the high pressure pump
18SP729Rev2019-08-08. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
18SP728Rev2019-08-08. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
18SP727Rev2019-08-08. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
18SP726Rev2019-08-08. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
19-008WI2019-08-08. Service bulletin. EQUIPMENT. Warranty Information Letter sent to customers regarding new refrigerator supplier for returning parts.
DOC-10344522019-08-08. Service bulletin. EQUIPMENT. Training Solution created by DTNA to provide guidance to customers when searching for service information for components and systems not owned by Daimler Trucks North America (DTNA).
19-009WI2019-08-08. Service bulletin. STRUCTURE. Warranty Information Letter - Expanded guidelines for paint-related claims sent out to Freightliner, Western star, Thomas Built Bus, Export and Direct warranty customers
18SP725Rev2019-08-07. Service bulletin. ENGINE; EQUIPMENT; FUEL SYSTEM, DIESEL. This service kit includes all necessary parts to replace the high pressure fuel rail feed lines, mounting bracket, P-clips and mounting hardware in the event one of these parts are loosened, removed or missing from the engine.
sb543132019-08-06. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin provided to customers regarding installation of a new MCM 21-pin jumper harness.
sbw00152019-06-03. Service bulletin. SUSPENSION. Service Bulletin- sbw0015 Vibration and Harsh Ride Troubleshooting
GHG172019-04-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Letter to customer on Coverage Extension GHG17 After Treatment
sbw00152019-04-08. Service bulletin. SUSPENSION. Service Bulletin Vibration and Harsh Ride Troubleshooting

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