Toyota bulletin T-SB-0037-25
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.
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 | not yet checked |
| T-SB-0037-25 | Service bulletin | Apr 18, 2025 | 11018356 | not yet checked |
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.
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.
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.