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Service bulletins for the 2020 Western Star 4700

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.

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

By type

By component

Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
CAL WST 32-0022019-12-02. Service bulletin. EQUIPMENT; SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY. Customer Advisory Letter for Airliner welded axle seats. The welded axle seats were installed incorrectly on the rear most drive axle for specific vehicles resulting in an incorrect axle pinion angle. The existing welded axle seats will be removed and replaced with new axle seats installed in the correct orientation.
SBW00-0042019-11-24. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Service Bulletin explaining Western Star's courtesy engineering policy.
TS10345702019-11-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Training Solution provides information related to the new Microgateway (MGW) found on Western Star 4700 Cummins Applications.
CALWS15-0012019-11-21. Service bulletin. POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. Customer Advisory Letter for Allison flex plate mounting bolts. The incorrect flex plate mounting bolts were installed for certain vehicles.
SBW41-0022019-11-21. Service bulletin. SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Service Bulletin for midship bearing replacement. This procedure applies to all vehicles built with driveshafts SPL140, SPL170 or SPL250 with first order driveline vibration.
SBW32-0182019-11-21. Service bulletin. EQUIPMENT; SUSPENSION:REAR. Service Bulletin for Hendrickson HaulMaax Rear Suspension Transverse Torque Rod Tower Bracket Replacement.
SB98-0152019-11-20. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT ADAPTIVE/MOBILITY. Service Bulletin for paint finish standards. Delfleet One has been added for aftermarket use. This version replaces service bulletin dated May 5, 2017.
WP19-0192019-11-20. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Warranty Policy letter announcing service locations have 90 calendar days from delivery to open a repair order which Identifies and addresses discrepancies from the sales order.
19-018WI2019-10-31. Service bulletin. EQUIPMENT. WARRANTY INFORMATION LETTER for coverage validation
SS10344992019-10-30. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Service Solution on failing RX modules in Western Star vehicles.
CAL_WS_420012019-10-30. Service bulletin. SERVICE BRAKES, AIR; EQUIPMENT. Customer Advisory Letter for WABCO HP air dryer turbo cut-off valve replacement.
SS10345312019-10-30. Service bulletin. SERVICE BRAKES, AIR; EQUIPMENT. Service Solution for WABCO HP air dryer turbo cut-off valve replacement.
19-016WP2019-10-30. Service bulletin. EQUIPMENT. WARRANTY POLICY LETTER- Hold disposition for Parts has been eliminated
19-015WP2019-10-29. Service bulletin. EQUIPMENT. Warranty Policy Letter- To assist customers and the service network regarding the Aftermarket Parts Limited Parts Warranty (Parts Warranty).
19TL-202019-10-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Tool Letter for DAVCO Shop Pro FXP 95-230V compatible for Australia Electrical Systems.
19TL-192019-10-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Tool Letter for DAVCO Shop Pro FXP 95-230V compatible for Chile and Italy Electrical Systems
P&SSep20192019-10-08. Service bulletin. EQUIPMENT. Parts and Service Committee meeting minutes
DOC-10345002019-10-03. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Service Solution to fix AC cooling performance due to improper HVAC function.
19TL-152019-09-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Tool Letter for ICC5 Programming Cable
WP19-0142019-09-28. Service bulletin. EQUIPMENT. Warranty Policy Change for Delivery-Related Changes: Electronic Proof of Delivery and Loose Component Claim Filing
SB00-082019-09-28. Service bulletin. EQUIPMENT. Service Bulletin for Dealer Product Report
15CSA-3REV2019-09-10. Service bulletin. EQUIPMENT. Customer Service Announcement Letter Revision for Dealers/Distributors Accessing DDEC Backdoor Passwords

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