Toyota bulletin T-TT-0756-24
What it saysPhone call sound quality may be adjusted to fit the Tacoma owner’s preferences. NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Apr 29, 2024, received Jul 6, 2024, about the electrical system — 2 documents under this number. It names 4 model years (2020–2023). 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 communicationPhone call sound quality may be adjusted to fit the Tacoma owner’s preferences.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-TT-0756-24 | Service bulletin | Apr 29, 2024 | 11003654 | |
| T-TT-0756-24 | Service bulletin | Apr 29, 2024 | 11003599 |
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 4 model years this bulletin names have filed 284 complaints with NHTSA since 2015. 30 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.
The contact owns a 2023 Toyota Tacoma. The contact stated that while reversing, the RPM and engine surged while turning the steering wheel. There were no warning lights illuminated. The vehicle was taken to the local dealer, who informed the contact that there was no coverage for the failure of the vehicle.
2023 Toyota Tacoma · Electrical System · filed with NHTSA May 29, 2024 · ODI 11591263
Truck will stall at random times and random speeds. All the engine lights will turn on and then the truck will shut off. Need to roll to a safe spot to stop the vehicle, put it in park, turn the engine off, then turn it back on
2022 Toyota Tacoma · Electrical System · filed with NHTSA May 25, 2023 · ODI 11523923
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 group21 other manufacturer communications filed against the Toyota Tacoma 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-0016-26 | Service bulletin | Feb 26, 2026 | Some 2024 – 2026 model year Tacoma vehicles may exhibit a “chirp” noise from the HVAC magnetic clutch upon engagement. |
| T-SB-0106-22 OBSOLETE | Service bulletin | Jan 30, 2026 | OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26. |
| T-SB-0001-26 | Service bulletin | Jan 28, 2026 | Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool… |
| T-TT-0790-25 | Service bulletin | Aug 20, 2025 | Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Fre… |
| 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-SB-0084-24 REV1 | Service bulletin | Apr 16, 2025 | Some 2024 Tacoma and Tacoma Hybrid vehicles equipped with a Blind Spot Monitor (BSM) may exhibit a condition where the Trailer Driving Assis… |
| T-TT-0780-25 | 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-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… |
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-0756-24 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-0756-24 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-0756-24 cover?
The manufacturer filed it against 4 model years: 2023 Toyota Tacoma, 2022 Toyota Tacoma, 2021 Toyota Tacoma, 2020 Toyota Tacoma. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.