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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
ZE6_WEP_Dealer L2017-08-14. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. DL: In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Warranty Enhancement Program (the "Program"). This Program extends the warranty coverage for repairs related to cracked and/or sticky/melting Dashboards (Instrument Panels) as a result of heat or humidity on 2003 - 2005 model year 4Runner, 2005 - 2010 model year Avalon, 2007 - 2011 model year Camry and Camry Hybrid, 2004 - 2010 model year Sienna, and 2004 - 2008 model year Solara vehicles. In Mid-December, 2014 Toyota announced the reimbursement Phase of this Program. Since prior to that announcement, Toyota has been diligently making parts preparations for the parts replacement phase of this Program. Due to the age, volume, and breadth of the covered vehicles subject to the Program and the size and complexity of dashboard manufacturing, Toyota will be launching the part replacement portion of this Program is several phases; please refer to the table below for part replacement model phasing.
ZE6_WEP_Region L2017-08-14. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. RL: In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Warranty Enhancement Program (the "Program"). This Program extends the warranty coverage for repairs related to cracked and/or sticky/melting Dashboards (Instrument Panels) as a result of heat or humidity on 2003 - 2005 model year 4Runner, 2005 - 2010 model year Avalon, 2007 - 2011 model year Camry and Camry Hybrid, 2004 - 2010 model year Sienna, and 2004 - 2008 model year Solara vehicles.
T-SB-0039-152017-08-14. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. TSB: Certain 2003 - 2011 model year Toyota vehicles may exhibit a condition where the instrument panel pad (dashboard) becomes cracked and/or has a shiny/degraded appearance. The pad surface may also become sticky or adherent. Follow the procedure in this bulletin to address this condition.
T-SB-0043-14 Rev2017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system. NOTE: There are new security provisions required to obtain a Reset Pass-Code. It is critical that the instructions for this new process are reviewed BEFORE attempting to get a Pass-Code in the new system.
T-SB-0134-142017-08-01. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. TSB: The purpose of this bulletin is to provide precautions to follow when installing an automatic transmission/transaxle assembly to avoid MIL "ON" shifting issues and/or transmission damage. Use the information in this bulletin when installing an automatic transmission/transaxle assembly.
T-SB-0014-11 Rev2017-08-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; POWER TRAIN:AUTOMATIC TRANSMISSION. TSB: The purpose of this service bulletin is to provide information regarding the installation of the correct torque converter bolts during automatic transmission/transaxle assembly replacement. Incorrect torque converter bolts or missing washers can cause damage to the torque converter assembly.
ER11_Re-Notifica2017-08-01. Service bulletin. SUSPENSION:FRONT:CONTROL ARM:LOWER ARM; EQUIPMENT; STRUCTURE:BODY:DOOR; ELECTRICAL SYSTEM. Region Letter: Safety Recall completion is important not only in satisfying government requirements but also is an integral part of our commitment to meet customer expectations of Toyota products. Toyota will be sending Safety Recall Follow-Up Notices to remind owners whose vehicles have not yet had campaign repairs completed. We request your assistance in completing the applicable campaign repairs as owners receive the Follow-Up Notice and contact your dealership. Please note the follow-up activity may cause an increase in your current campaign owner appointments. Toyota will continue with additional follow-up activities in the months to come. Please take this into consideration when analyzing your manpower requirements.
ER11_Re-Notifica2017-08-01. Service bulletin. SUSPENSION:FRONT:CONTROL ARM:LOWER ARM; STRUCTURE:BODY:DOOR; EQUIPMENT; ELECTRICAL SYSTEM. Region Letter: Toyota will be sending Safety Recall Follow-Up Notices to remind owners whose vehicles have not yet had campaign repairs completed. Please note the following information for Regional and PD associates.
GR1_DEALER LETTE2017-03-31. Service bulletin. POWER TRAIN; SEAT BELTS. "DEALER LETTER: SAFETY RECALL COMPLETION IS IMPORTANT NOT ONLY IN SATISFYING GOVERNMENT REQUIREMENTS, BUT ALSO IS AN INTEGRAL PART OF OUR COMMITMENT TO MEET CUSTOMER EXPECTATIONS OF TOYOTA PRODUCTS. TOYOTA WILL BE SENDING SAFETY RECALL FOLLOW-UP NOTICES TO REMIND OWNERS WHOSE VEHICLES HAVE NOT YET HAD CAMPAIGN REPAIRS COMPLETED. WE REQUEST YOUR ASSISTANCE IN COMPLETING THE APPLICABLE CAMPAIGN REPAIRS AS OWNERS RECEIVE THE FOLLOW-UP NOTICE AND CONTACT YOUR DEALERSHIP. PLEASE NOTE THE FOLLOW-UP ACTIVITY MAY CAUSE AN INCREASE IN YOUR CURRENT CAMPAIGN OWNER APPOINTMENTS. TOYOTA WILL CONTINUE WITH ADDITIONAL FOLLOW-UP ACTIVITIES IN THE MONTHS TO COME. PLEASE TAKE THIS INTO CONSIDERATION WHEN ANALYZING YOUR MANPOWER REQUIREMENTS."
GR1_REGION LETTE2017-03-31. Service bulletin. POWER TRAIN; SEAT BELTS. REGION LETTER: TOYOTA WILL BE SENDING SAFETY RECALL FOLLOW-UP NOTICES TO REMIND OWNERS WHOSE VEHICLES HAVE NOT YET HAD CAMPAIGN REPAIRS COMPLETED. PLEASE NOTE THE FOLLOWING INFORMATION FOR REGIONAL AND PD ASSOCIATES.
ZF2_WARRANTY POL2017-03-31. Service bulletin. SEAT BELTS. IN CERTAIN 2004 TO 2006 MODEL YEAR SIENNA VEHICLES, TOYOTA HAS RECEIVED SOME REPORTS WHERE THE FRONT SEATBELTS (RIGHT AND/OR LEFT) MAY SLOWLY OR NON-SMOOTHLY RETRACT.
ZF2_DEALER LETTE2017-03-31. Service bulletin. SEAT BELTS. "DEALER LETTER: BACKGROUND TOYOTA HAS RECEIVED A NUMBER OF REPORTS REGARDING FRONT SEATBELTS IN CERTAIN 2004 – 2006 MODEL YEAR SIENNA VEHICLES. IN THESE REPORTS, CUSTOMERS HAVE INDICATED THAT THE FRONT SEATBELTS (RIGHT AND/OR LEFT) MAY SLOWLY OR NON-SMOOTHLY RETRACT. ALTHOUGH THE FRONT SEATBELT ASSEMBLY IS COVERED BY TOYOTA’S NEW VEHICLE LIMITED WARRANTY FOR 5 YEARS OR 60,000 MILES (WHICHEVER COMES FIRST), WE AT TOYOTA CARE ABOUT THE CUSTOMERS’ OWNERSHIP EXPERIENCE. TOYOTA IS NOW EXTENDING THE WARRANTY COVERAGE FOR REPAIRS RELATED TO SLOW OR NON-SMOOTH RETRACTION OF FRONT SEATBELTS. THE FOLLOWING INFORMATION IS PROVIDED TO INFORM YOU AND YOUR STAFF OF THE PROGRAM NOTIFICATION SCHEDULE AND YOUR DEGREE OF INVOLVEMENT."
WPB (POL 14-11)_2017-03-31. Service bulletin. STRUCTURE; EQUIPMENT. "WPB: TOYOTA HAS RECEIVED REPORTS WHERE SOME VEHICLES MAY EXHIBIT CRACKED AND/OR STICKY/MELTING DASHBOARDS AS A RESULT OF HEAT OR HUMIDITY. IN MID-DECEMBER, 2014 TOYOTA ANNOUNCED THE REIMBURSEMENT PHASE OF THIS WARRANTY ENHANCEMENT PROGRAM. SINCE PRIOR TO THAT ANNOUNCEMENT, TOYOTA HAS BEEN DILIGENTLY MAKING PARTS PREPARATIONS FOR THE PARTS REPLACEMENT PHASE OF THIS PROGRAM. DUE TO THE AGE, VOLUME, AND BREADTH OF THE COVERED VEHICLES SUBJECT TO THE PROGRAM AND THE SIZE AND COMPLEXITY OF DASHBOARD MANUFACTURING, TOYOTA WILL BE LAUNCHING THE PART REPLACEMENT PORTION OF THIS PROGRAM IN SEVERAL PHASES; PLEASE REFER TO THE TABLE BELOW FOR PART REPLACEMENT MODEL PHASING. ALTHOUGH TOYOTA IS INCREASING PRODUCTION LEVELS, IT IS DIFFICULT TO PREDICT CUSTOMER DEMAND AND WHERE PARTS NEED TO BE SHIPPED TO SUPPORT CUSTOMER DEMAND. IT IS IMPORTANT THAT DEALERSHIPS EXPLAIN TO CUSTOMERS THAT THERE STILL MAY BE A PERIOD OF TIME THE CUSTOMER WILL NEED TO WAIT BEFORE PART REPLACEMENT CAN BE PERFORMED. PLEASE BE SURE TO TAKE THIS INTO CONSIDERATION WHEN PERFORMING CUSTOMER SCHEDULING."
T-TT-0362-152017-03-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED.
T-TT-0381-162017-03-21. Service bulletin. EQUIPMENT. TECH TIP: SOME CUSTOMERS MAY EXPERIENCE DIFFICULTY PROGRAMMING HOMELINK.
T-SB-0012-13 REV2017-03-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "TSB: FLASH REPROGRAMMING ALLOWS THE ECU SOFTWARE TO BE UPDATED WITHOUT REPLACING THE ECU. FLASH CALIBRATION UPDATES FOR SPECIFIC VEHICLE MODELS/ECUS ARE RELEASED AS FIELD-FIX PROCEDURES DESCRIBED IN INDIVIDUAL SERVICE BULLETINS. THIS BULLETIN DETAILS THE TECHSTREAM ECU FLASH REPROGRAMMING PROCESS AND OUTLINES USE OF THE TECHNICAL INFORMATION SYSTEM (TIS) AND THE CALIBRATION UPDATE WIZARD (CUW). FLASH CALIBRATION UPDATES CAN ONLY BE APPLIED TO THE VEHICLE/ECU COMBINATION FOR WHICH THEY ARE INTENDED. ECUS HAVE INTERNAL SECURITY THAT WILL NOT ALLOW THEM TO BE PROGRAMMED WITH ANOTHER ECU’S INFORMATION."
POL14-112017-03-03. Service bulletin. EQUIPMENT. "WPB: TOYOTA HAS RECEIVED REPORTS WHERE SOME VEHICLES MAY EXHIBIT CRACKED AND/OR STICKY/MELTING DASHBOARDS AS A RESULT OF HEAT OR HUMIDITY. IN MID-DECEMBER, 2014, TOYOTA ANNOUNCED THE REIMBURSEMENT PHASE OF THIS WARRANTY ENHANCEMENT PROGRAM. SINCE PRIOR TO THAT ANNOUNCEMENT, TOYOTA HAS BEEN DILIGENTLY MAKING PARTS PREPARATIONS FOR THE PARTS REPLACEMENT PHASE OF THIS PROGRAM. DUE TO THE AGE, VOLUME, AND BREADTH OF THE COVERED VEHICLES SUBJECT TO THE PROGRAM AND THE SIZE AND COMPLEXITY OF DASHBOARD MANUFACTURING, TOYOTA HAS LAUNCHED THE PART REPLACEMENT PORTION OF THIS PROGRAM IN SEVERAL PHASES; PLEASE REFER TO THE TABLE BELOW FOR PART REPLACEMENT MODEL PHASING."
ZE6_DEALERD 12/32017-03-03. Service bulletin. EQUIPMENT. DD: IN MID-DECEMBER 2014, TOYOTA ANNOUNCED THE REIMBURSEMENT PHASE OF THIS PROGRAM. SINCE PRIOR TO THAT ANNOUNCEMENT, TOYOTA HAS BEEN DILIGENTLY MAKING PARTS PREPARATIONS FOR THE PARTS REPLACEMENT PHASE OF THIS PROGRAM. DUE TO THE AGE, VOLUME, AND BREADTH OF THE COVERED VEHICLES SUBJECT TO THE PROGRAM AND THE SIZE AND COMPLEXITY OF DASHBOARD MANUFACTURING, TOYOTA HAS LAUNCHED THE PART REPLACEMENT PORTION OF THIS PROGRAM IN SEVERAL PHASES; PLEASE REFER TO THE TABLE BELOW FOR PART REPLACEMENT MODEL PHASING.
ZE6_DEALER 12/32017-03-03. Service bulletin. EQUIPMENT. DL: IN OUR CONTINUING EFFORTS TO ENSURE THE BEST IN CUSTOMER SATISFACTION, TOYOTA HAS ANNOUNCED A WARRANTY ENHANCEMENT PROGRAM (THE “PROGRAM”). THIS PROGRAM EXTENDS THE WARRANTY COVERAGE FOR REPAIRS RELATED TO CRACKED AND/OR STICKY/MELTING DASHBOARDS (INSTRUMENT PANELS) AS A RESULT OF HEAT OR HUMIDITY ON 2003-2005 MODEL YEAR 4RUNNER, 2005-2010 MODEL YEAR AVALON, 2007-2011 MODEL YEAR CAMRY AND CAMRY HYBRID, 2004-2010 MODEL YEAR SIENNA, AND 2004-2008 MODEL YEAR SOLARA VEHICLES.
T-SB-0125-152017-03-02. Service bulletin. SEAT BELTS:FRONT:RETRACTOR. TSB: SOME 2004 – 2006 MODEL YEAR SIENNA VEHICLES MAY EXHIBIT A CONDITION WHERE THE FRONT DRIVER AND/OR PASSENGER SEAT BELT BECOMES ABNORMALLY SLOW TO RETRACT, OR DOES NOT RETRACT SMOOTHLY. FOLLOW THE PROCEDURE IN THIS BULLETIN TO REPLACE THE FRONT SEAT BELT ASSEMBLIES TO ADDRESS THIS CONDITION.
T-SB-0125-15 REV2016-12-30. Service bulletin. SEAT BELTS. TSB: WARRANTY OPERATION CODES UPDATED. SOME 2004 – 2006 MODEL YEAR SIENNA VEHICLES MAY EXHIBIT A CONDITION WHERE THE FRONT DRIVER AND/OR PASSENGER SEAT BELT BECOMES ABNORMALLY SLOW TO RETRACT, OR DOES NOT RETRACT SMOOTHLY. FOLLOW THE PROCEDURE IN THIS BULLETIN TO REPLACE THE FRONT SEAT BELT ASSEMBLIES TO ADDRESS THIS CONDITION.
T-SB-0125-15 REV2016-12-20. Service bulletin. SEAT BELTS:FRONT:RETRACTOR; SEAT BELTS. TSB: WARRANTY OPERATION CODES UPDATED. SOME 2004 – 2006 MODEL YEAR SIENNA VEHICLES MAY EXHIBIT A CONDITION WHERE THE FRONT DRIVER AND/OR PASSENGER SEAT BELT BECOMES ABNORMALLY SLOW TO RETRACT, OR DOES NOT RETRACT SMOOTHLY. FOLLOW THE PROCEDURE IN THIS BULLETIN TO REPLACE THE FRONT SEAT BELT ASSEMBLIES TO ADDRESS THIS CONDITION.
TC13-0192016-04-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
T-TT-0051-102016-04-12. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
T-SB-0187-122016-04-12. Service bulletin. TIRES. SUMMARY TO BE PROVIDED ON A FUTURE DATE.

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