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Service bulletins for the 2004 Toyota Sienna

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.

257 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
002062006-03-07. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. SEAT HEATER INOPERATIVE. *TT
05062006-01-19. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. 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
004052006-01-19. Service bulletin. SUSPENSION:FRONT. FRONT SUSPENSION TICK NOISE. *TT
012052005-12-20. Service bulletin. ELECTRICAL SYSTEM. REPAIR MANUAL SUPPLEMENT: LASER CRUISE CONTROL BEAM AXIS ADJUSTMENT. *AK
006052005-11-03. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR. SQUEAL OR CHIRP TYPE NOISE EMITTED FROM THE BLOWER MOTOR AT VARIOUS SPEEDS. *TT
043052005-11-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. NO START IN SUB-FREEZING AMBIENT AIR TEMPERATURES. *TT
010052005-08-16. Service bulletin. EQUIPMENT:ELECTRICAL. DIAGNOSTIC GUIDE FOR REAR SEAT ENTERTAINMENT SYSTEMS. *TT
004052005-08-13. Service bulletin. TIRES. RUN FLAT TIRE REPAIR CRITERIA. *TT
001052005-07-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0031, P0051, P2238, AND/OR P2241. *TT
002052005-07-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0346 (CAMSHAFT POSITION SENSOR A CIRCUIT RANGE/PERFORMANCE [BANK 2]). *TT
016052005-07-26. Service bulletin. ENGINE AND ENGINE COOLING. FUEL INJECTOR TICKING NOISE. *TT *SC
008052005-07-26. Service bulletin. VISIBILITY:REAR WINDOW WIPER/WASHER. REAR WIPER IMPROVEMENT. *TT
011052005-07-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. COUNTERMEASURES TO THE AIR CONDITIONER (A/C) MAGNETIC CLUTCH RELAY FOR A/C LIGHT FLASHING (INOPERATIVE A/C) ISSUES ON SOME VEHICLES EQUIPPED WITH A MAGNETIC CLUTCH COMPRESSOR. *TT
010042005-02-02. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. TRANSMISSION SHIFTER MAY BECOME PROGRESSIVELY DIFFICULT TO MOVE. *TT
008042005-02-01. Service bulletin. SERVICE BRAKES, HYDRAULIC. INTERMITTENT VSC ACTIVATION AFTER STARTING THE ENGINE AND DRIVING STRAIGHT FROM A STOP POSITION. THIS CONDITION IS ALWAYS ACCOMPANIED BY THE INSTRUMENT PANEL VSC LIGHT AND AUDIBLE WARNING BUZZER TURNING ON AT THE SAME TIME. *NM UPDATE. *TT
048042005-02-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REPAIR MANUAL SUPPLEMENT: LEV II EVAP SYSTEM CHECK - DIAGNOSTIC TROUBLE CODE (DTC) P0441, P0442, P0446, P0451, P0452, P0453, P0455 AND P0456. *NM
004032005-01-26. Service bulletin. ENGINE AND ENGINE COOLING. VSC INDICATOR IS ILLUMINATED AND SETTING FAULT CODE DIAGNOSTIC TROUBLE CODE YAW RATE SENSOR MAY BE SETTING AN IMPROPER DIAGNOSTIC CODE. *EH
040172004-12-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. 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
TC040162004-12-02. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS. LIMITED SERVICE CAMPAIGN 40H TO REPLACE THE POWER STEERING FLUID RETURN HOSES. TECHNICAL INSTRUCTIONS; DEALERSHIP AND OWNER NOTIFICATION. *TT
005042004-12-02. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. TIRE PRESSURE WARNING SYSTEM INFORMATION AND RE-INITIALIZATION. *TT
005032004-12-01. Service bulletin. UNKNOWN OR OTHER. 2004 MODEL YEAR PRE-DELIVERY SERVICE (PDS). ALL '04 MODELS EXCEPT PRIUS. *TT
016042004-11-15. Service bulletin. STRUCTURE:BODY. REAR NO. 2 SEAT STORAGE POSITION. *TT
041042004-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MALFUNCTION INDICATOR LAMP (MIL) ON, DIAGNOSTIC TROUBLE CODE (DTC) P0037, P0038 OR P0136. *NM
005042004-11-04. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. SEAT HEATER ONLY WORKS ON HIGH. *TT
037042004-11-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE BANK 1 AND BANK 2 A/F AND 02 IDENTIFICATION. VARIOUS TOYOTA MODELS. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.