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Service bulletin 12 04 98

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 id602474
Published by NHTSA1998-11-05
Manufacturer's number12 04 98
Manufacturer's date1998-09-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

A SITUATION WITH THE VACUUM HOSE GOING TO THE SECONDARY AIR NON-RETURN VALVE MAY BE INCORRECTLY ROUTED. *YC

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
BMW E46 SERIES

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