Honda bulletin A23-078
What it saysTorque converters may not have been manufactured to proper specifications. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated May 21, 2025, received Sep 6, 2023, about the engine — 5 documents under this number. It names 6 model years (2017–2019). 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 communicationService Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
Trouble codes it names: P0741
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A23-078 | Service bulletin | May 21, 2025 | 11019252 | PDF, 174 KB |
| A23-078 | Service bulletin | May 21, 2025 | 11019241 | PDF, 174 KB |
| A23-078 | Service bulletin | Apr 18, 2025 | 11017326 | PDF, 74 KB |
| A23-078 | Service bulletin | Oct 6, 2023 | 10244188 | PDF, 142 KB |
| A23-078 | Service bulletin | Aug 31, 2023 | 10241879 | PDF, 155 KB |
What the document itself lists
The manufacturer titles it “Warranty Extension: 2017–19 Multi Model 6AT Torque Converter – DTC”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 90310-TK5-A00 | was added | — | eBay Motors → |
| 06260-R9R-000 | Torque Converter Kit | 1 | eBay Motors → |
| 90371-SAA-010 | Flange Nut | 4 | eBay Motors → |
| 90163-SDB-A00 | Flange Bolt | 3 | eBay Motors → |
| 90113-S10-000 | — | — | |
| 90382-SH9-003 | — | 2 | |
| 90163-SDA-A01 | Flange Bolt (10X35) | 2 | eBay Motors → |
| 90362-SZA-A00 | Flange Nut (12mm) | 6 | eBay Motors → |
| 90135-TG7-A50 | Steering Joint Yoke Bolt | 1 | eBay Motors → |
| 90365-STX-A00 | Castle Nut (14mm) | 2 | eBay Motors → |
| 90167-SAA-010 | Bolt-Washer (10X25) | 4 | eBay Motors → |
| 90161-SHJ-A00 | Flange Bolt (12X30) | 8 | eBay Motors → |
| 90165-TK8-A00 | Flange Bolt (14X125) | 2 | eBay Motors → |
| 90165-TZ5-A10 | Flange Bolt (14x140) | 2 | eBay Motors → |
| 90051-R97-000 | Flange Bolt (12X70) | 2 | eBay Motors → |
| 90305-S3V-A11 | Spindle Nut | 2 | eBay Motors → |
| 26000-R9R-315 | — | — |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 2181BM | Replace Torque Converter (includes DTC clear and alignment) | 7.2 hrs |
Read by machine from the document NHTSA serves (3 pages), read Oct 4, 2026. A part number is shown only where it matches Honda’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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the torque converter for the 2019 Pilot →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 3,056 complaints with NHTSA since 2015. 1,460 of them name Engine, Power Train — 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.
On the 2017 Honda Pilot, the 87 owners who gave an odometer reading for Engine reported it at a median of 55,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2019 Honda Ridgeline. The contact stated that while driving and making a left turn, the vehicle failed to accelerated. No waring light illuminated. The contact stated that the failure occurred four times. The vehicle was not repaired. The manufacturer was not made aware of the failure.
2019 Honda Ridgeline · Power Train · filed with NHTSA Feb 7, 2020 · ODI 11307666
The transmission unexpectedly shift into neutral while driving. This happened in middle of the road at 6:30 PM. My son was in the vehicle and it was dangerous to stop in the middle of the road. Accident can occur. Nine-speed automatic for random drops into neutral
2017 Honda Pilot · Power Train · filed with NHTSA Jul 26, 2017 · ODI 11010846
I purchased a new 2019 Honda Pilot ex-l in december, 2018. I was recently exiting an off ramp from an interstate and when I pressed the accelerator to merge into traffic the vehicle hesitated significantly and the check engine light started flashing.
2019 Honda Pilot · Engine · filed with NHTSA Mar 6, 2019 · ODI 11184653
In depth: 2019 Honda Pilot engine problems → · 2018 Honda Pilot engine problems → · 2018 Honda Pilot transmission and drivetrain problems → · 2017 Honda Pilot 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 group27 other manufacturer communications filed against these Honda models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Honda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ATI&05122026902 | Other | May 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with… |
| ATI&05122026901 | Other | May 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&04292026901 | Other | Apr 29, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with… |
| ATI&04272026904 | Other | Apr 27, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&04132026905 | Other | Apr 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&01302026904 | Other | Jan 31, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&01142026905 | Other | Jan 14, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&10232025903 | Other | Oct 23, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023-2025 Pilots with a customer complaint of a no auto re-st… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Honda, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Honda A23-078 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 A23-078 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 Honda warranty extension on file lists the ones Honda has filed.
Which vehicles does A23-078 cover?
The manufacturer filed it against 6 model years: 2019 Honda Pilot, 2018 Honda Pilot, 2017 Honda Pilot, 2019 Honda Ridgeline, 2018 Honda Ridgeline, 2017 Honda Ridgeline. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.