Honda bulletin A26-091 v1
What it saysAmerican Honda has identified a condition that may affect Collision Mitigation Braking System (CMBS) operation. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Jul 24, 2026, received Aug 5, 2026, about the forward collision avoidance. It names 6 model years (2017–2020). 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 - American Honda has identified a condition that may affect Collision Mitigation Braking System (CMBS) operation. Due to software programming issues of the Advanced Driver Assistance System (ADAS), unexpected vehicle deceleration may occur.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A26-091 v1 | Service bulletin | Jul 24, 2026 | 11035885 | PDF, 158 KB |
What the document itself lists
The manufacturer titles it “Product Update: 2018–20 Accord/2017–19 CR-V CMBS Software Update”.
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 7385A4 | Update CMBS Software | 0.3 hrs |
Read by machine from the document NHTSA serves (2 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 warnings for the 2020 Accord →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 8,266 complaints with NHTSA since 2015. 2,009 of them name Forward Collision Avoidance — 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 2018 Honda CR-V, the 60 owners who gave an odometer reading for Forward Collision Avoidance reported it at a median of 36,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
On several occasions and almost never under similar circumstances, my entire Brake System suddenly shows there is a problem and flashes warnings on my dashboard - parking brake, power steering, vehicle stability assist, hill start assist, adaptive cruise control, collision mitigation, road departure systems - each systems shows there is…
2020 Honda Accord · Forward Collision Avoidance · filed with NHTSA May 10, 2024 · ODI 11588179
We were driving down the road, when my car automatically “detected” a car in front of me and braked extremely hard. Thing is, there were no car or obstacle in front is. I was able to catch that on my dash cam
2019 Honda Accord · Forward Collision Avoidance · filed with NHTSA Feb 24, 2022 · ODI 11453760
In depth: 2020 Honda Accord automatic emergency braking problems → · 2019 Honda Accord automatic emergency braking problems → · 2018 Honda Accord automatic emergency braking problems → · 2019 Honda CR-V automatic emergency braking 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 forward collision avoidance
Source: same model, same component group5 other manufacturer communications filed against these Honda models under the same component group (forward collision avoidance), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ONL6UV09092026 | Other | Sep 10, 2026 | Owner Notification Letter - Honda has developed software updates to the Honda Sensing system to enhance driver experience by modifying the c… |
| A26-091 | Service bulletin | Jul 31, 2026 | Service Bulletin - Honda has developed software updates to the Honda Sensing system to enhance driver experience by modifying the circumstan… |
| AEBM07242026901 | Other | Jul 24, 2026 | Dealer Message - Due to software programming issues of the Advanced Driver Assistance System (ADAS), unexpected vehicle deceleration may occ… |
| A26-036 | Service bulletin | Apr 8, 2026 | "Service Bulletin - When the Adaptive Cruise Control (ACC) system is activated while driving, customers may experience unexpected cancellati… |
| A21080A | Service bulletin | Oct 17, 2023 | "ServiceNews Article - When returning the vehicle to the client, inform them that if the message Adaptive Cruise Control System Problem come… |
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 A26-091 v1 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 A26-091 v1 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 A26-091 v1 cover?
The manufacturer filed it against 6 model years: 2020 Honda Accord, 2019 Honda Accord, 2018 Honda Accord, 2019 Honda CR-V, 2018 Honda CR-V, 2017 Honda CR-V. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.