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Service bulletin GRP21/933

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 id39766
Published by NHTSA1995-11-01
Manufacturer's numberGRP21/933
Manufacturer's date1995-03-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

VEHICLES, WHEN LEFT IDLING FOR LONG PERIODS MAY, IN SOME CASES DEVELOP IRREGULAR IDLING. *TW

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
VOLVO 9601992 to 1994

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