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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
T-SB-0134-162018-11-26. Service bulletin. ENGINE. TSB: Supersession Notice. 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.
ZE6-Toyota POL142018-11-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Policy Bulletin: 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 voluntary 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.
Safety Recall an2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Update on Technician Certification Requirements.
PG006-01-Obsolet2018-10-15. Service bulletin. EQUIPMENT:OTHER:LABELS; EQUIPMENT. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
PG004-97-Obsolet2018-10-15. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:LABELS. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
T-SB-0304-17_Rev2018-08-20. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE July 31, 2018 Rev2: ? The Supersession Notice has been updated. January 11, 2018 Rev1: ? The Supersession Notice has been updated. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, and T-SB-0144-08. Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, and T-SB-0144-08 are obsolete and any printed versions should be discarded. Vehicle replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) may be available from Toyota, provided the request meets one of the criteria listed in this Service Bulletin. Replacement Certification Label and VIN Plate Criteria A replacement certification label and/or VIN plate may be requested if: ? The vehicle was in an accident and the label and/or plate is damaged or attached to a part that will be replaced during the repair. ? The label and/or plate was stolen.
T-SB-0057-182018-08-20. Service bulletin. EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0043-14. ? Applicability has been updated to include 2017 ? 2018 model year Toyota vehicles. Service Bulletin No. T-SB-0043-14 is obsolete and any printed versions should be discarded. 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 New security provisions are required to obtain a reset passcode. It is critical to review the instructions for this new process BEFORE attempting to get a passcode in the new system.
ZF2_Expired Reme2018-08-20. Service bulletin. SEAT BELTS:FRONT. Dealer Package: July 2, 2018 A watermark has been added to the Dealer Letter to indicate that ZF2 expired on June 30, 2018. 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. Owner Letter Mailing Date Toyota will begin to notify owners in mid-January, 2016 and will be mailed over several months. A sample of the owner notification letter has been included for your reference.
T-SB-0039-15_Rev2018-06-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE May 25, 2018 Rev1: * The Introduction, Production Change Information, and Repair Procedure sections have been updated. Any previous printed versions of this bulletin should be discarded. Some 2003 - 2011 model year Toyota vehicles may exhibit a condition where the instrument panel pad (dashboard) becomes cracked and/or sticky. Follow the procedure in this bulletin to address this condition.
T-TT-0086-112018-04-23. Service bulletin. POWER TRAIN. TechTip: Condition - 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-SB-0125-15 Rev2018-04-23. 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.
ESS_Technical In2018-04-23. Service bulletin. EQUIPMENT. Technical Instructions: The repair quality of covered vehicles is extremely important to Toyota. All dealership technicians performing this repair are required to successfully complete the most current version of the E-Learning course ?Safety Recall and Service Campaign Essentials.? To ensure that all vehicles have the repair performed correctly, technicians performing this repair are required to currently hold at least one of the following certification levels: ? Toyota Certified (any classification) ? Toyota Expert (any classification) ? Master Technician ? Master Diagnostic Technician
ESS_Dealer Lette2018-04-23. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Dealer Letter: Toyota has received reports indicating that some vehicles may experience spare tire carrier or carrier cable corrosion even after being inspected and/or repaired as part of a previous Special Service Campaign. During normal usage, water splashing rearward can reach the spare tire carrier due to variation in the placement of the foam splash guard or loss of the splash guard. If the splashed water contains high concentrations of road salt, corrosion of the spare tire carrier and the carrier cable may result. In limited instances, the spare tire may become seperated from the spare tire carrier and create a road hazard that could cause a vehicle crash. Toyota has revised the inspection and remedy procedures for this special service campaign. All owners of affected vehicles in Warm Climate States are now eligible for an inspection of the spare tire carrier assembly and cable.
ESS_Region Lette2018-04-23. Service bulletin. TIRES:TEMPORARY/EMERGENCY SPARE TIRE; EQUIPMENT:MECHANICAL. Dealer Daily: The Special Service Campaign ESS Dealer Letter and Technical Instructions are now available on TIS.
ESS_Dealer Daily2018-04-23. Service bulletin. TIRES:TEMPORARY/EMERGENCY SPARE TIRE; EQUIPMENT. Dealer Daily: Toyota has received reports indicating that some vehicles may experience spare tire carrier or carrier cable corrosion even after being inspected and/or repaired as part of a previous Special Service Campaign. During normal usage, water splashing rearward can reach the spare tire carrier due to variation in the placement of the foam splash guard or loss of the splash guard. If the splashed water contains high concentrations of road salt, corrosion of the spare tire carrier and the carrier cable may result. In limited instances, the spare tire may become seperated from the spare tire carrier and create a road hazard that could cause a vehicle crash. Toyota has revised the inspection and remedy procedures for this special service campaign. All owners of affected vehicles in Warm Climate States are now eligible for an inspection of the spare tire carrier assembly and cable.
WPB (POL 14-11)_2018-04-23. Service bulletin. STRUCTURE. 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.
ZE6_Dealer Lette2018-04-23. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. 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.
ZE6_Warranty Enh2018-04-23. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. 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-TT-0362-152018-04-23. Service bulletin. ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 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.
ZE6_Electronic C2018-04-23. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Electronic Communication: In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Warranty Enhancement Program. This program extends the warranty coverage for repairs related to cracked and/or sticky/melted 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.
ZE6_Region Lette2018-04-23. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Region Letter: In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Warranty Enhancement Program. This program extends the warranty coverage for repairs related to cracked and/or sticky/melted 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.
GR1_Dealer Lette2018-04-23. Service bulletin. SEAT BELTS:FRONT; SEAT BELTS:FRONT:RETRACTOR. 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.
TC-16-0012018-04-23. Service bulletin. SEAT BELTS:FRONT:RETRACTOR; SEAT BELTS:FRONT. 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.
Pol-16-012018-04-23. Service bulletin. SEAT BELTS:FRONT; SEAT BELTS:FRONT:RETRACTOR. 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 Lette2018-04-23. Service bulletin. SEAT BELTS:FRONT:RETRACTOR; SEAT BELTS:FRONT. 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.

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