Technical Service Bulletin T-SB-0035-25 — 2025 TOYOTA SIENNA HYBRID
STRUCTURE:BODY
Bulletin Details
| TSB ID | T-SB-0035-25 |
| Manufacturer | |
| Vehicle | 2025 TOYOTA SIENNA HYBRID |
| Component | STRUCTURE:BODY |
| Communication Date |
Bulletin 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.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.