Toyota bulletin T-SB-0081-24
What it saysSome 2023 – 2024 model year Corolla and Corolla Cross vehicles with M20A-FKS engines may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: P11EA00 – (Bank 1 Air-Fuel… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Sep 23, 2024, received Nov 6, 2024, about the engine. It names 4 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 model year Corolla and Corolla Cross vehicles with M20A-FKS engines may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: •P11EA00 – (Bank 1 Air-Fuel Ratio Imbalance (Port)) •P013A7C – (A/F Sensor – Rich to Lean Bank 1 Sensor 2 Slow Response) There are no drivability issues or other symptoms associated with this condition.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0081-24 | Service bulletin | Sep 23, 2024 | 11010094 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 17120-F2010 | Manifold Assy, Intake | 1 | eBay Motors → |
| 17171-24020 | Gasket, Intake Manifold to Head, No.1 | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| EG2410 | R&R Intake Manifold | 1.3 hrs |
Read by machine from the document NHTSA serves (5 pages), read Sep 30, 2026. A part number is shown only where it matches Toyota’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 390 complaints with NHTSA since 2015. 125 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.
Upon startup in cold weather conditions, a brief but loud grinding/rattling sound will occur. The noise is related to an inadequate spring inside of the intake camshaft gear which will not push a small cylinder in place to lock the intake camshaft gear in place.
2024 Toyota Corolla · Engine · filed with NHTSA Mar 12, 2025 · ODI 11647879
Drove car at reasonable low speeds (30-40mph) parked vehicle and noticed smell of something burning and light smoke. Opened hood and car was on fire. No mods, completely stock, low mileage. All services up to date. No reasonable explanation for sudden fire
2023 Toyota Corolla · Engine · filed with NHTSA Nov 30, 2025 · ODI 11702094
While returning home from an outing, I accelerated the gas to switch lanes and the check engine light came on, I heard a gravel like pop noise. And saw smoke coming from my car towards the back. A car next to me told me to pull over as my car was on fire.
2024 Toyota Corolla Cross · Engine · filed with NHTSA Oct 26, 2024 · ODI 11622069
In depth: 2023 Toyota Corolla Cross engine 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 engine
Source: same model, same component group32 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-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. |
| 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-SB-0104-21 OBSOLETE | Service bulletin | Feb 27, 2026 | OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete. |
| 22TC07 | Other | Nov 17, 2025 | Owner Renotification Letter Due to certain programing in the engine ECU, under certain conditions, the vehicle may stall at low speeds when… |
| T-SB-0088-23 OBSOLETE | Service bulletin | Aug 19, 2025 | OBSOLETE NOTICE August 19, 2025: This bulletin is now obsolete. Please see T-SB-0059-25. |
| T-SB-0059-25 | Service bulletin | Aug 15, 2025 | Some 2020 – 2025 model year Corolla vehicles may exhibit a vibration or rattle noise from the right-hand engine mounting insulator sub-assem… |
| T-SB-0112-24 REV2 | Service bulletin | Jun 19, 2025 | Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Eng… |
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-0081-24 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-SB-0081-24 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-SB-0081-24 cover?
The manufacturer filed it against 4 model years: 2024 Toyota Corolla, 2023 Toyota Corolla, 2024 Toyota Corolla Cross, 2023 Toyota Corolla Cross. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.