Sienna AWD

32 service bulletins filed with NHTSA for this model year

• Jan 7, 2026UNKNOWN OR OTHERT-SB-0055-24 Rev2

  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 a

• Dec 2, 2025STRUCTURE:BODYT-TT-0795-25

  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.

• Nov 24, 2025STRUCTURE:BODYT-SB-0087-25

  Some 2024 – 2025 model year Sienna Hybrid and Sienna Hybrid MaaS Package vehicles may exhibit a condition in which the rear No. 1 seat assembly (for captain seat type) squeaks or rattles while driving. The condition(s) can occur on both the driver and passenger side seats of the vehicle. Application of noise reducing felt has been developed to improve and reduce these conditions.

• Nov 6, 2025STRUCTURE:BODYT-SB-0082-25

  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.

• Jul 24, 2025UNKNOWN OR OTHERT-SB-0035-25 Rev1

  Some 2025 model year Sienna Hybrid vehicles equipped with the advanced rear seat reminder system may exhibit one or both of the following conditions: •A “Rear Seat Reminder Malfunction – Visit Your Dealer” message on the Multi-information Display (MID). •Diagnostic Trouble Code (DTC) U117487 (Lost Communication with Cabin Occupant Recognition Sensor Missing) present in the main body ECU. The cabin object recognition sensor assembly logic has been modified to address these conditions.

• Jun 13, 2025ELECTRICAL SYSTEMT-SB-0058-23 Rev1

  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.

• Apr 9, 2025STRUCTURE:BODYT-SB-0035-25

  Some 2025 model year Sienna Hybrid vehicles equipped with the advanced rear seat reminder system may exhibit one or both of the following conditions: • A “Rear Seat Reminder Malfunction – Visit Your Dealer” message on the Multi-information Display (MID). • Diagnostic Trouble Code (DTC) U117487 (Lost Communication with Cabin Occupant Recognition Sensor Missing) present in the main body ECU. The cabin object recognition sensor assembly logic has been modified to address these conditions.

• Apr 2, 2025ELECTRICAL SYSTEMT-TT-0779-25

  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.

• and 24 more

Source: NHTSA manufacturer communications (technical service bulletins).