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Service bulletin 236039

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 id10001286
Published by NHTSA2003-04-28
Manufacturer's number236039
Manufacturer's date2003-02-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

CONSTANT PRESSURE VALVE REPLACEMENT. *TT

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 WG
VOLVO WX
VOLVO WXLL
VOLVO WXR

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