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Service bulletins for the 2018 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.

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

By type

By component

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
0604-172019-04-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. SPN 712 (CPC) (GHG17)
cal540012019-03-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Customer Advisory Letter- Battery Power Cable Routing
18-032-NoDefectF2018-12-10. Service bulletin. ELECTRICAL SYSTEM. Warranty Bulletin for charge back exemtions
FL766 Western St2018-12-10. Service bulletin. ELECTRICAL SYSTEM. Recall Bulletin FL766- Western Star Power Cable Studs
Emission Recall2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Emission Recall D18R5 GHG17 DD Platform Model Years 2016-2018 Software Reprogramming For California Onboard Diagnostics
DD13, DD15, DD162018-12-10. Service bulletin. ELECTRICAL SYSTEM. DD13, DD15, DD16 Check Engine Light Flashing or Blinking
DOC-10331942018-12-10. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES. SS - 1033194 WST 4900FA Cab Mounting Crossmember Interfering with Battery Cables Heat Shield
DOC-10331942018-10-29. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES. SS - 1033194 WST 4900FA Cab Mounting Crossmember Interfering with Battery Cables Heat Shield
0501-182018-10-29. Service bulletin. ENGINE; EQUIPMENT; ELECTRICAL SYSTEM. 0501-18 Aftertreatment Control Module (ACM)
FL7562018-10-29. Service bulletin. SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, AIR; ELECTRICAL SYSTEM. Brake Light Pressure switch may not activate the brake lights with a light application of the brake pedal.
DOC-10333332018-10-29. Service bulletin. ELECTRICAL SYSTEM:WIRING; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. SS 1033333 - WST ECC Replacement Jumper Harness Installation.
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
0326-172018-06-18. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. (ACM) (GHG17)
0346-172018-06-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. (CPC) (GHG17)
sbw54392018-06-18. Service bulletin. ELECTRICAL SYSTEM. RX Module Fault Codes
711-132018-06-18. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 711-13 SPN 100-FMI 4 - ALL YEARS
0204-17 SPN 52102018-06-18. Service bulletin. ELECTRICAL SYSTEM. 0204-17 SPN 521050 (MCM) (GHG17)
0205-17 SPN 52102018-06-18. Service bulletin. ELECTRICAL SYSTEM. 0205-17 SPN 521052 (MCM) (GHG17)
0405-182018-06-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 0405-18 Symptom Diagnostics - Range Up or Down Shift Issue
0402-182018-06-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ELECTRICAL SYSTEM. 0402-18 SPN 625 (CPC) (GHG14)
0401-182018-06-18. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 0401-18 SPN 1231 (MCM) (EPA10 GHG14)
sbw54392018-06-18. Service bulletin. ELECTRICAL SYSTEM. sbw5439 RX Module Fault Codes
sbw49112018-06-11. Service bulletin. ELECTRICAL SYSTEM. sbw4911 DEF Gauge Reading Incorrectly
1102-172018-06-11. Service bulletin. ELECTRICAL SYSTEM. SPN 157 (MCM) (GHG17)

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