Service bulletins for the 2021 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.
176 on file from NHTSA, as of 2026-10-19.
| 24TE04 | 2026-09-09. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
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| 22TE09 | 2026-06-04. ELECTRICAL SYSTEM. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start. |
| 22TE09 | 2026-02-11. ELECTRICAL SYSTEM. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start. |
| 24TE04 | 2025-04-08. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 24TE04 | 2025-03-11. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 24TE04 | 2025-01-09. ENGINE. CUSTOMER SUPPORT PROGRAM 24TE04 Multiple Model & Model Year Toyota Vehicles Coverage for Flow Shut-off Valve Coolant Leak Frequently Asked Questions |
| 24TE04 | 2025-01-09. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 24TE04 | 2025-01-09. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 24TE04 | 2025-01-09. ENGINE. In our continuing efforts to ensure the best in customer satisfaction, Toyota is announcing a Customer Support Program to provide coverage for Flow Shut-off Valve Coolant Leak on multiple Model & Model Year Toyota Vehicles. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 24TE04 | 2025-01-09. ENGINE. This Customer Support Program provides coverage as it applies to Flow Shut-off Valve Coolant Leak on Certain 2019-2021 Avalon & Avalon HV, 2018-2021 Camry & Camry HV, Certain 2020-2021 Corolla, Certain 2019-2021 Corolla HB, 2020-2021 Highlander, Certain 2019-2021 RAV4 & RAV4 HV, Certain 2021 RAV4 PHV, Certain 2021 Sienna HV, Certain 2021 Venza vehicles. The specific condition covered by this program is a small engine coolant leak can occur from a specific valve that can allow coolant to drip on other parts of the vehicle. This can cause "Maintenance Required" to be displayed on the instrument cluster or cause the A/C not to function normally. If the condition is verified, the vehicle will be repaired with a new Flow Shut-off Valve under the terms of this Customer Support Program |
| 24TE04 | 2025-01-09. ENGINE. Frequently Asked Questions CUSTOMER SUPPORT PROGRAM 24TE04 Multiple Model & Model Year Toyota Vehicles Coverage for Flow Shut-off Valve Coolant Leak |
| 24TE04 | 2025-01-09. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
A warranty extension may pay for a repair after the basic warranty has ended. Read the document for which vehicles and which repair it covers.
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By component
By trouble code
| T-SB-0110-20 Rev2 | 2026-09-09. Service bulletin. ENGINE. OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26. |
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| T-SB-0051-26 | 2026-09-09. Service bulletin. ENGINE. This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. |
| 24TE04 | 2026-09-09. Warranty extension. ENGINE. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 22TE09 | 2026-06-04. Warranty extension. ELECTRICAL SYSTEM. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start. |
| T-SB-0104-21 Rev2 | 2026-03-07. Service bulletin. ENGINE. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete. |
| T-SB-0106-22 Rev2 | 2026-02-11. Service bulletin. ELECTRICAL SYSTEM. OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26. |
| T-SB-0001-26 | 2026-02-11. Service bulletin. ELECTRICAL SYSTEM. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. |
| T-SB-0055-24 Rev2 | 2026-02-11. Service bulletin. UNKNOWN OR OTHER. Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Service Bulletin is to provide general guidelines and procedures for odor remediation. This Service Bulletin provides a guide on how to prepare and treat the interior of the vehicle for odor remediation. Refer to the applicable model and model year Repair Manual and the EPA (Environmental Protection Agency) website for the most up-to-date safety and precautionary guidelines. |
| 22TE09 | 2026-02-11. Warranty extension. ELECTRICAL SYSTEM. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start. |
| T-TT-0795-25 | 2026-01-09. Service bulletin. STRUCTURE:BODY. Some customers may experience a condition in which the 2021-2025 Sienna HV 2nd row FRAME SUB-ASSY, No.1 does not function even when the stow lever is pulled. Because the cable has come off from the bracket that holds it inside. |
| T-SB-0082-25 | 2025-12-05. Service bulletin. STRUCTURE:BODY. Some 2021 – 2025 model year Sienna Hybrid vehicles may exhibit a sloshing or splashing noise from inside one or more door panels when driving, opening and/or closing a door, and/or braking. This condition may be caused by cavity wax, debris, or other materials that may block door drain holes and restrict water from draining properly. |
| 22TE09 | 2025-10-08. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR CUSTOMER SUPPORT PROGRAM 22TE09 HV FLOOR UNDER WIRE HARNESS AND REAR TRACTION MOTOR CABLE CORROSION CERTAIN 2021 – 2024 MODEL YEAR SIENNA HYBRID |
| 22TE09 | 2025-10-08. Service campaign. ELECTRICAL SYSTEM. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start. |
| 24TE04 | 2025-09-09. Service campaign. ENGINE. The specific condition covered by this program is for a small engine coolant leak that can occur from the flow shut-off valve that can allow coolant to drip on other parts of the vehicle. This can cause "Engine Maintenance Required" to be displayed on the instrument cluster or cause the A/C not to function normally. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 22TD04 | 2025-08-08. Service campaign. ELECTRICAL SYSTEM. 22TD04 Expired on June 30, 2025 A Toyota Genuine Accessory Dash Camera was installed in the involved vehicles. If the Micro SD Card used in the accessory dash camera is damaged the accessory dash camera may continuously attempt to read/write data to the card. This can lead to an increase in temperature of the card and may lead to localized melting of the card and the surrounding area of the dash cam. |
| 22TD04 | 2025-08-08. Service campaign. ELECTRICAL SYSTEM. 22TD04 Expired on June 30, 2025 A Toyota Genuine Accessory Dash Camera was installed in the involved vehicles. If the Micro SD Card used in the accessory dash camera is damaged the accessory dash camera may continuously attempt to read/write data to the card. This can lead to an increase in temperature of the card and may lead to localized melting of the card and the surrounding area of the dash cam. |
| T-SB-0112-24 Rev2 | 2025-07-10. Service bulletin. ENGINE. Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is displayed in the Multi-Information Display (MID). Additionally, the vehicle will exhibit DTC(s) P268111 (Engine Coolant Bypass Valve Circuit Short to Ground) and/or P268115 (Engine Coolant Bypass Valve Circuit Short to Battery or Open). |
| T-SB-0058-23 Rev1 | 2025-07-10. Service campaign. ELECTRICAL SYSTEM. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks. |
| 25TC03 | 2025-06-06. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
| T-TT-0780-25 | 2025-06-06. Service bulletin. ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE. |
| 25TC03 | 2025-05-15. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.