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Service bulletin KC-342

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 id10200946
Published by NHTSA2021-09-03
Manufacturer's numberKC-342
Manufacturer's date2021-08-26
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; EQUIPMENT

NHTSA's summary

Selective Catalytic Reduction (SCR) Parts Supersession; New Part Numbers For SCR Muffler/Canister - All One Box And Two Box Configurations EXCEPT Turbo Compound - US17+OBD16 And US17+OBD18 Emissions, Model Years 2018 And 2019

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, Catalytic converter

Vehicles listed
MACK MACK
VOLVO VOLVO

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