Toyota bulletin T-SB-0088-23
What it saysSome 2020 – 2024 model year Corolla vehicles may exhibit a vibration or rattle noise from the right-hand engine mounting insulator sub-assembly. NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Apr 1, 2024, received Jul 6, 2024, about the engine — 2 documents under this number. It names 5 model years (2020–2024). 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 2020 – 2024 model year Corolla vehicles may exhibit a vibration or rattle noise from the right-hand engine mounting insulator sub-assembly. This condition will usually go away when the engine Revolutions Per Minute (RPM) are above idle. This condition is typically found on vehicles in warm climates/weather. No Diagnostic Trouble Codes (DTCs) are associated with this condition. REVISION NOTICE April 01, 2024 Rev1: •The Warranty Information section has been updated
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0088-23 | Service bulletin | Apr 1, 2024 | 11003604 | |
| T-SB-0088-23 | Service bulletin | Apr 1, 2024 | 11003549 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 12305-F2010 | Insulator Sub-assy, Engine Mounting, RH | 1 | eBay Motors → |
| 12305-24110 | Insulator Sub-assy, Engine Mounting, RH | 1 | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| EG2305 | R&R the RH Engine Mount | 0.7 hrs |
Read by machine from the document NHTSA serves (3 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 5 model years this bulletin names have filed 766 complaints with NHTSA since 2015. 181 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.
The contact owns a 2022 Toyota Corolla Hatchback. While the contact's wife was driving at an undisclosed speed, the steering power low and the engine stop warning lights illuminated. The vehicle lost motive power in the middle of the road. The contact's infant child was an occupant in the vehicle at the time of the failure.
2022 Toyota Corolla · Engine · filed with NHTSA Apr 2, 2025 · ODI 11652272
On more than one occasion I was going between 5-10 miles an hour and the car sputtered and felt like it was going to shut off. I told the dealership when I took the car in for regular service and the told me the computer did not find anything wrong and they could not replicate the problem when driving it.
2020 Toyota Corolla · Engine · filed with NHTSA Jan 25, 2020 · ODI 11301854
2021 Toyota Corolla. Consumer writes in regard to unintended acceleration. The consumer stated that while parking the vehicle accelerated over a barrier. When the consumer reversed the vehicle, it accelerated backwards into another vehicle causing damage. The vehicle was being repaired
2021 Toyota Corolla · Engine · filed with NHTSA Jun 1, 2022 · ODI 11466934
In depth: 2020 Toyota Corolla 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 group30 other manufacturer communications filed against the Toyota Corolla 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. |
| 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… |
| T-TT-0784-25 REV1 | Service bulletin | Jun 17, 2025 | Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these typ… |
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-0088-23 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-0088-23 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-0088-23 cover?
The manufacturer filed it against 5 model years: 2024 Toyota Corolla, 2023 Toyota Corolla, 2022 Toyota Corolla, 2021 Toyota Corolla, 2020 Toyota Corolla. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.