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.
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Only bulletins with type: Service campaign are shown. Show all
| 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. |
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| 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-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 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. |
| 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.