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Service bulletin WSTCAE121-2014

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10193657
Published by NHTSA2021-05-18
Manufacturer's numberWSTCAE121-2014
Manufacturer's date2014-01-25
NHTSA componentSERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, AIR

NHTSA's summary

AIR BRAKE RESERVOIRS - NEW TRIPLE CHAMBER AIR TANK

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes

Vehicles listed
WESTERN STAR 48002015
WESTERN STAR 49002015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20192372019-05-17. Brakes
19V3700002019-05-14. SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK
20182832018-05-29. Brakes
18V3510002018-05-29. SERVICE BRAKES, AIR
20175832017-11-28. Brakes
20171302017-03-10. Brakes
17V1240002017-02-27. SERVICE BRAKES, AIR
15V1850002015-03-30. SERVICE BRAKES, AIR
20145482014-12-03. Brakes
14V7580002014-11-28. SERVICE BRAKES, AIR:DISC:CHAMBER

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TS10337682020-07-31. Service bulletin. Training Solution for Western Star Front Brake Squeal - Burnishing Procedure. The brake burnishing procedure can be used to help reduce brake related noise or imbalance concerns which may occur in the field.
FL773 Lowmax Bra2019-04-08. Service bulletin. Recall Bulletin FL773 Lowmax Brake Hoses
FL773 Lowmax Bra2019-04-01. Service bulletin. Recall Bulletin FL773 Lowmax Brake Hoses
DOC-10337682018-12-10. Service bulletin. TS 1033768: Western Star Front Brake Squeal - Burnishing Procedure
DOC-10334172018-12-10. Service bulletin. SS 1033417: WST 4900 Low Max w/Disc Brakes Front Brake Hose rubbing Hood fender
DOC-10334172018-10-29. Service bulletin. SS 1033417: WST 4900 Low Max w/Disc Brakes Front Brake Hose rubbing Hood fender
FL7562018-10-29. Service bulletin. Brake Light Pressure switch may not activate the brake lights with a light application of the brake pedal.
ICI15-0032018-06-25. Service bulletin. ICI15-003-DLR FL676 - Interim Recall Notice
326-152018-06-18. Service bulletin. 326-15 Main Shaft Speed Sensor
ssbw420102018-06-18. Service bulletin. ssbw42010 Inspección de fugas de aire del transportista concesionario