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Service bulletin 0506

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 id10018857
Published by NHTSA2006-01-19
Manufacturer's number0506
Manufacturer's date2006-01-30
Replaces0506
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

NHTSA's summary

WARRANTY COVERAGE ENHANCEMENT - ISOLATED REPORTS FROM EXTREME COLD CLIMATE AREAS THAT THE RADIATOR MAY CRACK AT THE BASE OF ONE OR MORE OF THE RADIATOR TUBES, RESULTING IN COOLANT LEAKAGE - CUSTOMER SUPPORT PROGRAM. *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, Cooling system, Radiator

Vehicles listed
TOYOTA SIENNA2004, 2005

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

Other bulletins for the same vehicles and component
040172004-12-02. Service bulletin. LIMITED SERVICE CAMPAIGN (LSC) 40I TO REPLACE THE RADIATOR. COLD WEATHER CONDITIONS MAY CAUSE THE BASE OF THE RADIATOR WALL TO CRACK, RESULTING IN THE LEAKAGE OF ENGINE COOLANT. *TT THIS IS AN AMENDED VERSION. *TT