Toyota bulletin T-TT-0709-22
What it saysTT: ?Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does not meet their expectation. ?To extend the life of the EV Battery, some limitations may occur during EV battery charging… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated May 10, 2024, received Oct 24, 2022, about the equipment — 3 documents under this number: T-TT-0709-22 Rev2, T-TT-0709-22 Rev and 1 more. It names 2 model years (2023–2024). 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 communicationTT: ?Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does not meet their expectation. ?To extend the life of the EV Battery, some limitations may occur during EV battery charging ?This communication is a reference to the factors that can lead to charging limitations, as explained in the Owner?s Manual (Electric Vehicle System - Section 2.2)
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-TT-0709-22 Rev2 | Service bulletin | May 10, 2024 | 11005146 | |
| T-TT-0709-22 Rev | Service bulletin | Dec 19, 2022 | 10230379 | not found |
| T-TT-0709-22 | Service bulletin | Sep 29, 2022 | 10224589 | not found |
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.
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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 45 complaints with NHTSA since 2015. 13 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.
UNKNOWN , 11/26/2024 car in garage would not start, car was tow to Toyota and Toyota replaced the battery. then on 02/06/2025 vehicle was in garage and would not start and vehicle was tow again to Toyota dealer. Where dealer replaced 12 volt battery at 5,283 miles. And told us to put a battery charger on the battery
2023 Toyota bZ4X · Electrical System · filed with NHTSA Jun 10, 2025 · ODI 11666165
I leased a Toyota Bz4X the parking brake lights and other lights come on and off while I AM driving and fob is not touched. I took car in to be service for regular maintenance and was told I had to pay $295 and I AM under warranty. I was sold the car brand new and I don't think it is.
2024 Toyota bZ4X · Electrical System · filed with NHTSA Nov 17, 2025 · ODI 11699930
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 equipment
Source: same model, same component group6 other manufacturer communications filed against the Toyota bZ4X under the same component group (equipment), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB002623 | Service bulletin | Feb 19, 2024 | TSB: Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines sho… |
| TSB002823 | Service bulletin | Feb 13, 2024 | TSB: 2024 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat in the correct position. In a… |
| TSB002423 | Service bulletin | Feb 13, 2024 | TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include stora… |
| T-SB-0004-24 | Service bulletin | Feb 6, 2024 | TSB: 2025 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat in the correct position. In a… |
| TSB009523 | Service bulletin | Nov 21, 2023 | TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our new car customers. Customer feedback indicates the following areas dese… |
| LSB001923 | Service bulletin | Aug 24, 2023 | TSB: Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines sho… |
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-TT-0709-22 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-TT-0709-22 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-TT-0709-22 cover?
The manufacturer filed it against 2 model years: 2024 Toyota bZ4X, 2023 Toyota bZ4X. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.