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Service bulletin 501-14

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 id10141892
Published by NHTSA2018-06-18
Manufacturer's number501-14
Manufacturer's date2014-05-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; EQUIPMENT; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

501-14 Removal and Installation of the DD13 Exhaust Flanged Manifold

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

Engine, Equipment and accessories, Exhaust and emissions, Exhaust manifold, pipes and muffler

Vehicles listed
FCCC XBP2014 to 2015
FCCC XCM2014 to 2015
FCCC XCP2014 to 2015
FREIGHTLINER BUSINESS CLASS M22014 to 2015
FREIGHTLINER CASCADIA2014, 2015
FREIGHTLINER COLUMBIA2014, 2015
FREIGHTLINER CORONADO2014, 2015
WESTERN STAR 47002014, 2015
WESTERN STAR 49002014, 2015

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

Recalls for the same vehicles and component
15V8160002015-12-07. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
14V6800002014-10-29. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

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
0505-182018-12-10. Service bulletin. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low
0315-172018-06-18. Service bulletin. GHG14 - Intake Manifold Pressure Too Low
0314-172018-06-18. Service bulletin. GHG14 Intake Manifold Pressure Too Low
914-142017-10-15. Service bulletin. 914-14 Ambient and Inlet Manifold Pressure Difference (High Box)
FSC-SF 504A-C2015-08-29. Service bulletin. DAIMLER TRUCKS: EXHAUST TAILPIPE TERMINATING NEAR CNG TANK PROTECTOR RELIEF VALVE AND CONTINUAL HEATING OF EXHAUST DISCHARGE RESULTS IN CNG VENTING AND HAVING TAILPIPE EXTENSION INSTALLED, AND AWAY FROM CNG TANK PROTECTION RELIEF VALVE. MODEL 2012-14 CASCADIA.