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Service bulletins for the 2011 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.

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

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Bulletins, newest first
18SP713REV 18SP72017-05-31. Service bulletin. FUEL SYSTEM, OTHER. 18SP713REV 18SP713 –EPA10 DD13 THREE-FILTER FUEL SYSTEM TO TWO-FILTER KM59 GEN1 FUEL SYSTEM CONVERSION SERVICE KIT
16TL202017-05-31. Service bulletin. ENGINE. 16TL20 HEAVY DUTY ENGINE VALVE STEM SEAL INSTALLING DRIFT AND SLEEVE
16TL172017-05-30. Service bulletin. ENGINE. 16TL17 LABEL UPDATE FOR GHG14 TEST AFTERTREATMENT CONTROL MODULE (ACM)
09 09-162016-10-20. Service bulletin. ENGINE. 0909-16 EXCESSIVE OIL CONSUMPTION
09 06-162016-10-20. Service bulletin. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. 0906-16 LOW PRESSURE FUEL PUMP
09 02-162016-10-20. Service bulletin. ENGINE. 0902-16 SYMPTOM DIAGNOSTICS - BELT COMING OFF, SHREDDING OR MISALIGNMENT
16 TS-182016-10-20. Service bulletin. ENGINE. 16TS18 EPA10 AND LATER DD AUTO-ELEVATE FEATURE
08 09-162016-10-19. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0809-16 SYMPTOM DIAGNOSTICS : NOISY 1- BOX™ AFTERTREATMENT
54-552016-10-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SBW5455 VIRTUAL TECHNICIAN RETROFIT
16 TS-152016-10-18. Service bulletin. EQUIPMENT. 16TS15 EPA07 AND LATER POWER TAKE-OFF (PTO) DOSING FEATURE
16 TS-142016-10-17. Service bulletin. EQUIPMENT; ENGINE. 16TS14 EPA10 AND GHG14 SERVICE REPLACEMENT 1-BOX DOC INLET CHANGE
06 12-162016-09-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 0612-16 SPN 175 (MCM) (GHG17) AND SPN 175 (MCM); ( EPA07;EPA10;GHG14) DIAGNOSTIC PROCEDURE
06 11-162016-09-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. 0611-16 SPN 110 (MCM) (GHG17) AND SPN 110 (MCM); (EPA07;EPA10;GHG14) DIAGNOSTIC PROCEDURE
06 10-162016-09-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. 0610-16 SPN 111 (CPC) (GHG17) AND SPN 111 (CPC); (EPA07;EPA10;GHG14) DIAGNOSTIC PROCEDURE
06 09-162016-09-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. 0609-16 SPN 174 (MCM) (GHG17), SPN 174 (MCM) (EPA07), SPN 174; (MCM) (EPA10), AND SPN 174 DIAGNOSTIC PROCEDURE
06 05-162016-09-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 0605-16 SPN 625 (CPC)(GHG17) AND SPN 625 (CPC) (EPA10;GHG14) DIAGNOSTIC PROCEDURE
06 01-162016-09-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. 0601-16 SPN 103 (MCM) (GHG17) AND SPN 103 (MCM); (EPA07;EPA10;GHG14) DIAGNOSTIC PROCEDURE
WSB-49-112014-02-13. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. WESTERN STAR: WHEN TRUCK SITS, FOR ANY EXTENDED PERIOD, WITH A DIESEL EXHAUST FLUID (DEF) SYSTEM, IT WOULD CRYSTALLIZED, IN THE TANK, AROUND FLOAT, ON DEF LEVEL SENDING UNIT TUBE AND NEEDS TO BE CLEANED. *PE
SB-35-112014-01-24. Service bulletin. EQUIPMENT. WESTERN STAR: CONMET RECOMMENDS REPLACING THE BEARING SPACER WHEN THE HUB IS REMOVED. MODEL 4700, 4900, 6900. NO YEARS LISTED. *PE
SB-33-042014-01-23. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING. WESTERN STAR: IT HAS BEEN RECOMMENDED, BY CONMET, THAT THE BEARING SPACER BE REPLACED WITH NEW ONE WHEN HUB IS REMOVED. MODEL 4700, 4900, 6900.. NO YEARS LISTED. *PE
SF-483-A2013-08-28. Service bulletin. PARKING BRAKE. DAIMLER TRUCKS: ON CERTAIN TRUCKS, ENGINE MAY NOT RECEIVE COMPLETE PARK BRAKE ENGAGED INPUT SIGNAL FROM ELECTRONIC CONTROL CENTER (ECC), AND WILL BE MODIFIED, BY MOVING PARK BRAKE INPUT SIGNAL TO AN INDEPENDENT AIR SWITCH. MODEL 2010-2013 4700, 4900, 6900. *PE
SBW-20182013-01-16. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. WESTERN STAR: RADIATOR MOUNTING. SOME EPA COMPLIANT WESTERN STAR 4900 VEHICLES EQUIPPED WITH 1700 SQ IN ALUMINUM RADIATORS, MANUFACTURED MARCH 2010 AND LATER, WITH SPECIFIC COMBINATION OF ENGINE OPERATING PARAMETERS, MAY HAVE RADIATOR FAILURES RESULTING IN A COOLANT LEAK DUE TO A CRACK IN THE COOLANT TUBE. LEAKS IN ANY OTHER PLACE OTHER THAN THE COOLANT TUBES DO NOT APPLY FOR THIS BULLETIN. *JS
WSB-42-052012-10-24. Service bulletin. SERVICE BRAKES, AIR:DISC:CALIPER; SERVICE BRAKES, AIR:DISC. WESTERN STAR: AN ISSUE WITH THERMAL OVERLOAD ON BENDIX AIR DISC BRAKES WHERE ABS SENSOR WIRES MELTS, BRAKE ACTUATOR FAILS TO PROPERLY OPERATE DUE TO VENT HOLE IN BOTTOM NOT OPENING, CALIPERS COATED WITH RED OR BRIGHT ORANGE DUST AND TAPPED AND/OR GUIDE PIN BOOTS MELTED OR OTHERWISE SHOWS HEAT DAMAGE. MODELS CONSTELLATION, 4700, 4800, 4900, 5900 AND 6900. NO MODEL YEARS LISTED. *PE
SB-49-122012-06-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. WESTERN STAR: AROUND THE DIESEL EXHAUST FLUID (DEF) AN EXCESSIVE AMOUNT OF CRYSTAL OR POWDER BUILT UP INDICATES A LEAK CAUSED BY EVAPORATION OF DEF EXPOSED TO AIR AND/OR DAMPNESS. *PE
35-72012-04-27. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING; SUSPENSION:MULTIPLE AXLE; POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING. WESTERN STAR: LUBRICATE WHEEL BEARINGS, REAR DRIVE AXLES. *JS

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