Toyota bulletin T-SB-0037-25
What it saysSome 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor (BSM) system is inoperative, there is a BSM malfunction message… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Apr 18, 2025, received May 15, 2025, about the electrical system — 2 documents under this number. It names 2 model years (2024–2025). 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 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor (BSM) system is inoperative, there is a BSM malfunction message on the multi-information display (MID), or the driving assist information indicator is illuminated, along with one or more of the following Diagnostic Trouble Codes (DTCs) present: •C1AB413 – Outer Mirror Indicator (Module "B" Side) Circuit Open •C1AB513 – Outer Mirror Indicator (Module "A" Side) Circuit Open The BSM sensor software has been updated to reduce the possibility of these conditions.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0037-25 | Service bulletin | Apr 18, 2025 | 11019359 | |
| T-SB-0037-25 | Service bulletin | Apr 18, 2025 | 11018356 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 88162-0E131 | Sensor, Blind Spot Monitor | — | eBay Motors → |
| 88162-0E200 | Sensor, Blind Spot Monitor | — | eBay Motors → |
| 88162-0E210 | Sensor, Blind Spot Monitor | — | eBay Motors → |
| 88162-0E201 | Sensor, Blind Spot Monitor | — | eBay Motors → |
| 88162-0E133 | Sensor, Blind Spot Monitor | — | eBay Motors → |
| 88162-0E134 | Sensor, Blind Spot Monitor | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| EL2508 | Reprogram Both Blind Spot Monitor Sensors | 1.1 hrs |
Read by machine from the document NHTSA serves (5 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.
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 2 model years this bulletin names have filed 328 complaints with NHTSA since 2015. 6 of them name Electrical System — 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.
Missing the wire connector for the puddle lamp installation? although not a safety issue, would like to bring this to attention; wire connectors (and wires) missing on both driver and passenger doors? Not sure if this was a factory oversight, or an error in original wiring diagram of Toyota?
2025 Toyota Grand Highlander · Electrical System · filed with NHTSA Jun 28, 2025 · ODI 11669921
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 electrical system
Source: same model, same component group22 other manufacturer communications filed against the Toyota Grand Highlander under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-SB-0058-23 REV1 | Service campaign | Jun 13, 2025 | The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The… |
| T-TT-0779-25 | Service bulletin | Apr 2, 2025 | 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. T… |
| T-SB-0013-24 REV1 | Service bulletin | Feb 10, 2025 | The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is… |
| T-SB-0120-20 REV2 | Service bulletin | Jan 30, 2025 | OBSOLETE NOTICE January 30, 2025: This bulletin is now obsolete. Please see T-SB-0015-25. |
| T-SB-0015-25 | Service bulletin | Jan 29, 2025 | Some 2021 – 2025 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software… |
| T-SB-0111-20 REV2 | Service bulletin | Jan 23, 2025 | OBSOLETE NOTICE January 23, 2025: This bulletin is now obsolete. Please see T-SB-0011-25. |
| T-SB-0011-25 | Service bulletin | Jan 23, 2025 | When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. Th… |
| 23TJ01P5_TI_Publ | Service bulletin | Dec 21, 2024 | TI: TECHNICAL INSTRUCTIONS FOR 23TJ01 Second Key Delivery Program Multiple Models and Model Years |
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-0037-25 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-0037-25 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-0037-25 cover?
The manufacturer filed it against 2 model years: 2025 Toyota Grand Highlander, 2024 Toyota Grand Highlander. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.