Toyota bulletin T-SB-0025-25
What it saysSome 2024 model year bZ4X vehicles may exhibit a condition where the charging limit setting defaults to full after every key cycle, removing the upper limit set by the customer. NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Feb 12, 2025, received Mar 24, 2025, about the engine. It names 1 model year (2024). 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 model year bZ4X vehicles may exhibit a condition where the charging limit setting defaults to full after every key cycle, removing the upper limit set by the customer. The electric converter unit assembly software logic has been modified to address this condition.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0025-25 | Service bulletin | Feb 12, 2025 | 11015876 | PDF, 870 KB |
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.
Email me new Toyota bulletins for the bZ4X
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 24 complaints with NHTSA since 2015.
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 engine
Source: same model, same component group10 other manufacturer communications filed against the Toyota bZ4X under the same component group (engine), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-TT-0801-26 | Service bulletin | Apr 16, 2026 | Some Customers for the listed vehicles may have complaint of the following: unable to charge the vehicle using the supplied level 1 or 2 cha… |
| T-TT-0784-25 REV1 | Service bulletin | Jun 17, 2025 | Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these typ… |
| T-TT-0784-25 | Service bulletin | Jun 13, 2025 | Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these typ… |
| T-SB-0107-20 REV2 | Service bulletin | Feb 12, 2025 | OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T-SB-0021-25. |
| T-SB-0021-25 | Service bulletin | Feb 10, 2025 | Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for… |
| T-TT-0770-24 | Service bulletin | Dec 18, 2024 | Customers or Technicians may want to view the user manual or the troubleshooting guide for the Toyota EV Charger (Part Number PTQ64-00240).… |
| T-TT-0757-24 | Service bulletin | Jun 19, 2024 | Some customers may notice momentary power dips on graphs produced by the Charge Point Charger’s phone App during A/C charging. |
| T-SB-0120-20 | Service bulletin | Apr 15, 2024 | Some 2021 – 2024 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software… |
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-0025-25 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-0025-25 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-0025-25 cover?
The manufacturer filed it against 1 model year: 2024 Toyota bZ4X. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.