Toyota bulletin T-TT-0765-24
What it saysSome 2023-2024, Camry, Camry HV, Crown, RAV4, and RAV4 HV, may exhibit an oil leak from the cylinder head cover, near the union of the timing chain cover and cam housing. NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Oct 14, 2024, received Nov 8, 2024, about the engine. It names 6 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 communicationSome 2023-2024, Camry, Camry HV, Crown, RAV4, and RAV4 HV, may exhibit an oil leak from the cylinder head cover, near the union of the timing chain cover and cam housing.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-TT-0765-24 | Service bulletin | Oct 14, 2024 | 11010341 |
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 6 model years this bulletin names have filed 508 complaints with NHTSA since 2015. 78 of them name Engine — 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.
Intermittently as I press on the brake, the engine loses power, engine feels like it is going to die and the charge meter on the dash display drops to no charge. Right before the engine dies the engine regains charge on the dash display charge meter and the engine returns to normal. So far the engine has never totally died on me yet
2024 Toyota Crown · Engine · filed with NHTSA Oct 28, 2025 · ODI 11696024
The contact owns a 2023 Toyota Rav4 Hybrid. The contact stated while driving 15-20 MPH, the vehicle unexpectedly stopped. There were no warning lights illuminated. The contact attempted to restart the vehicle several times. After the failure, the engine and brake warning lights illuminated.
2023 Toyota RAV4 · Engine · filed with NHTSA Nov 22, 2024 · ODI 11626769
On multiple occasion's the vehicle takes longer than usual to start and it suddenly starts misfiring and running poorly when I'm driving it. At one point I was turning into a busy intersection and I thought the vehicle was going to stall.
2023 Toyota Camry · Engine · filed with NHTSA Dec 28, 2024 · ODI 11632817
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 group49 other manufacturer communications filed against these Toyota models 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-SB-0034-26 REV1 | Service bulletin | Sep 16, 2026 | Some 2025 – 2026 model year Camry HV vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P0A1B94… |
| T-SB-0110-20 OBSOLETE | Service bulletin | Aug 20, 2026 | OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26. |
| T-SB-0051-26 | Service bulletin | Aug 20, 2026 | This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. |
| 26TC03 | Service campaign | Aug 17, 2026 | In wet conditions, water contacting the radiator in the subject vehicles after idling for an extended period can create steam that can cause… |
| 24TE04 | Warranty extension | Aug 11, 2026 | This Customer Support Program provides coverage as it applies to Flow Shut-off Valve Coolant Leak on Certain 2019-2021 Avalon & Avalon HV, 2… |
| T-TT-0806-26 | Service bulletin | Jul 22, 2026 | State of Health (SOH): An estimate of battery health that is updated as the vehicle learns from operating and charging conditions over time.… |
| T-SB-0034-26 | Service bulletin | Jun 30, 2026 | Some 2025 — 2026 model year Camry HV vehicles may exhibit a MIL on condition with DTC P0A1B94… |
| 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… |
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-0765-24 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-0765-24 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-0765-24 cover?
The manufacturer filed it against 6 model years: 2024 Toyota Camry, 2023 Toyota Camry, 2024 Toyota Crown, 2023 Toyota Crown, 2024 Toyota RAV4, 2023 Toyota RAV4. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.