Honda bulletin A23110A
What it saysService News - Some customers have complained of fluid leaking from the rear differential after it has been serviced due to over-torqueing of the drain plugs during servicing. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Nov 3, 2023, received Nov 16, 2023, about the power train. It names 14 model years (2018–2024). 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 communicationService News - Some customers have complained of fluid leaking from the rear differential after it has been serviced due to over-torqueing of the drain plugs during servicing.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A23110A | Service bulletin | Nov 3, 2023 | 10245277 | PDF, 165 KB |
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 14 model years this bulletin names have filed 7,069 complaints with NHTSA since 2015. 54 of them name 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.
While operating an unmodified 2019 AWD Honda Hr-V per the included owner's guide (page 86), the brake pedal was required during 100% of a 15 mile descent to maintain the vehicle"s speed within the posted 35 MPH speed limit. The engine braking promised, in the "l" gear selector, by honda's owner's guide was lacking.
2019 Honda HR-V · Power Train · filed with NHTSA Jan 5, 2020 · ODI 11297210
Car was parked on flat ground, and I turned on the car and put it into reverse. The reverse sound started and the reverse camera displayed on the screen as normal, but when I pressed the accelerator, the car drove forward instead of back. I put the car in park then back to Reverse, but the same thing happened.
2024 Honda CR-V · Power Train · filed with NHTSA Jul 20, 2024 · ODI 11603583
Driving 65 on freeway, power loss and all the lights came on. pulled over and put it in park, dash said i was still in N and i took my foot off brake and it was rolling. I shut car off and waited so i could get to safer place. was able to start up - with all lights flashing.
2020 Honda HR-V · Power Train · filed with NHTSA Feb 12, 2024 · ODI 11571518
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 group14 other manufacturer communications filed against these Honda models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Honda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ATI&04272026903 | Other | Apr 27, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| ATI&04102026906 | Other | Apr 10, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| ATI&03312025902 | Other | Mar 31, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| A21-047 | Service bulletin | Feb 20, 2025 | "Service Bulletin - Due to the possibility of early deterioration of the Continuous Variable Transmission (CVT) drive belt, American Honda i… |
| ATI&01302025902 | Other | Jan 30, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| ATI&01162025901 | Other | Jan 17, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| ATI&01022025906 | Other | Jan 3, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
| ATI&12022024907 | Other | Dec 3, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021 CR-V FHEVs with a customer complaint of an oil leak comi… |
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 A23110A 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 A23110A 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 A23110A cover?
The manufacturer filed it against 14 model years: 2024 Honda CR-V, 2023 Honda CR-V, 2022 Honda CR-V, 2021 Honda CR-V, 2020 Honda CR-V, 2019 Honda CR-V and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.