Toyota bulletin T-TT-0748-24
What it saysTT: During repairs such as those listed below, damage may occur if the Torque Converter Assembly is not properly installed. ? NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Mar 12, 2024, received Apr 15, 2024, about the power train. It names 3 model years (2022–2024). 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: During repairs such as those listed below, damage may occur if the Torque Converter Assembly is not properly installed. ? Hybrid module assembly removal/installation ? Transmission removal/installation ? Engine removal/installation
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-TT-0748-24 | Service bulletin | Mar 12, 2024 | 10253233 | 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.
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 3 model years this bulletin names have filed 1,203 complaints with NHTSA since 2015. 360 of them name Power Train, 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 2024 Toyota Tundra Hybrid. The contact stated that while driving 3-20 MPH, the instrument cluster multi-information display (MID) located near the left side of the steering wheel was scrolling independently, causing the gauge information to be replaced independently on the instrument cluster.
2024 Toyota Tundra · Electrical System · filed with NHTSA Mar 18, 2025 · ODI 11648958
The new Tundra most of the features are controlled by the 14-inch Infotainment screen. The screen has gone completely dark and irresponsive to touch, power on/off, and hard reset by the dealership. Given that so many of the truck's safety features are controlled in this system, the vehicle is unsafe to operate.
2023 Toyota Tundra · Electrical System · filed with NHTSA Jul 12, 2023 · ODI 11531790
Throttle lag - When attempting to accelerate from near or complete stop vehicle will accelerate for a split second and then act as if it is stalling causing a dangerous situation. It has put me in a position where pulling out into traffic i'm left for 2-3 seconds with no throttle response
2022 Toyota Tundra · Power Train · filed with NHTSA Nov 12, 2022 · ODI 11493260
In depth: 2024 Toyota Tundra transmission and drivetrain problems → · 2023 Toyota Tundra transmission and drivetrain problems → · 2022 Toyota Tundra transmission and drivetrain problems →
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 power train
Source: same model, same component group9 other manufacturer communications filed against the Toyota Tundra under the same component group (power train), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-SB-0111-22 OBSOLETE | Service bulletin | Aug 24, 2026 | OBSOLETE NOTICE August 24, 2026: This bulletin is now obsolete. Please see T-SB-0032-26 |
| T-SB-0049-26 | Service bulletin | Aug 19, 2026 | Some 2022 – 2025 model year Tundra Hybrid, 2023 – 2025 model year Sequoia Hybrid, 2024 –2025 Land Cruiser and Tacoma Hybrid, and 2025 4Runne… |
| T-SB-0032-26 REV1 | Service bulletin | Aug 18, 2026 | Some customers of 2022 – 2026 model year Tundra vehicles equipped with specifically non-hybrid V35A-FTS engines may experience one or more o… |
| T-SB-0032-26 | Service bulletin | May 6, 2026 | Some customers of 2022 – 2026 model year Tundra vehicles equipped with specifically non-hybridV35A-FTS engines may experience one or more of… |
| T-SB-0095-24 | Service bulletin | Oct 15, 2024 | Some 2023 model year Sequoia Hybrid and 2022 – 2023 Tundra Hybrid vehicles may exhibit an oil leak between the automatic transmission and th… |
| T-SB-0086-24 | Service bulletin | Oct 2, 2024 | Some 2023 – 2024 model year Sequoia Hybrid and 2022 – 2024 model year Tundra Hybrid vehicles may exhibit a rattle sound from the hybrid modu… |
| T-TT-0748-24 REV1 | Service bulletin | Sep 3, 2024 | During repairs such as those listed below, damage may occur if the Torque Converter Assembly is not properly installed. • Hybrid module ass… |
| T-SB-0018-24 REV2 | Service bulletin | Jun 10, 2024 | Some 2023 – 2024 model year Sequoia Hybrid and 2022 – 2024 model year Tundra Hybrid vehicles may exhibit a condition where the vehicle start… |
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-0748-24 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-0748-24 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-0748-24 cover?
The manufacturer filed it against 3 model years: 2024 Toyota Tundra, 2023 Toyota Tundra, 2022 Toyota Tundra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.