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Service bulletin BTS180602

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 id10141194
Published by NHTSA2018-06-18
Manufacturer's numberBTS180602
Manufacturer's date2018-06-02
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE

NHTSA's summary

Tech line summary article - Have a vehicle in your shop with low mileage (less than 1,500 miles) and a hard-to-pinpoint engine knock? We're currently investigating vehicles for hairline fractures in the crankshaft sprocket, and we suspect it may be the cause for this noise. In some cases you may be able to see these fractures by just removing the crankshaft pulley; however, they can be very small and you may need to remove the cam chain to ensure a thorough inspection.

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, Exhaust and emissions, Crankcase ventilation (PCV)

Vehicles listed
ACURA ILX2017
ACURA TLX2017, 2018

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