Toyota Sienna Hybrid 2025 — technical service bulletin
Bulletin T-SB-0035-25 · NHTSA communication 11019336 · issued Apr 9, 2025
Technical service bulletin
communication type
Structure
component
2025
model years
1
vehicle entries
Official summary
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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.