Toyota bulletin T-SB-0035-25
What it saysSome 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… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Apr 9, 2025, received May 15, 2025, about the structure — 2 documents under this number. It names 1 model year (2025). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationSome 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.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0035-25 | Service bulletin | Apr 9, 2025 | 11019336 | |
| T-SB-0035-25 | Service bulletin | Apr 9, 2025 | 11018333 |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| EL2507 | Reprogram Cabin Object Recognition Sensor Assy | 0.9 hrs |
Read by machine from the document NHTSA serves (4 pages), read Sep 30, 2026. A part number is shown only where it matches Toyota’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the body for the 2025 Sienna →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 268 complaints with NHTSA since 2015. 17 of them name Structure — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The contact owns a 2025 Toyota Sienna Hybrid. The contact stated that the rear liftgate appeared to show a design flaw, and the left and right sides of the liftgate appeared to be misaligned. The contact stated that the liftgate door was difficult to open manually or electronically.
2025 Toyota Sienna · Structure · filed with NHTSA Sep 23, 2025 · ODI 11689178
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the structure
Source: same model, same component group20 other manufacturer communications filed against the Toyota Sienna under the same component group (structure), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-TT-0795-25 | Service bulletin | Dec 2, 2025 | 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… |
| T-SB-0087-25 | Service bulletin | Nov 24, 2025 | Some 2024 – 2025 model year Sienna Hybrid and Sienna Hybrid MaaS Package vehicles may exhibit a condition in which the rear No. 1 seat assem… |
| T-SB-0082-25 | Service bulletin | Nov 6, 2025 | Some 2021 – 2025 model year Sienna Hybrid vehicles may exhibit a sloshing or splashing noise from inside one or more door panels when drivin… |
| T-SB-0001-25 | Service bulletin | Jan 6, 2025 | Some 2021 – 2024 model year Sienna Hybrid vehicles may exhibit a condition in which the front passenger carpet is untucked and torn at the c… |
| T-SB-0039-24 REV2 | Service bulletin | Dec 6, 2024 | The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or… |
| T-SB-0038-24 REV2 | Service bulletin | Dec 6, 2024 | To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust… |
| T-SB-0035-24 REV2 | Service bulletin | Dec 6, 2024 | Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If t… |
| T-SB-0061-23 REV2 | Service bulletin | Dec 5, 2024 | Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material p… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Toyota, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Toyota T-SB-0035-25 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the T-SB-0035-25 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Toyota warranty extension on file lists the ones Toyota has filed.
Which vehicles does T-SB-0035-25 cover?
The manufacturer filed it against 1 model year: 2025 Toyota Sienna. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.