Acura bulletin BB29050
What it saysTech Line - Customers may experience error code S001 with their audio unit. NHTSA’s full summary ↓
Acura filed this with NHTSA as a manufacturer communication dated Aug 4, 2025, received Aug 18, 2025, about the electrical system. It names 3 model years (2025–2026). A manufacturer communication 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 communicationTech Line - Customers may experience error code S001 with their audio unit. The vehicle may also have DTC B2B05-92 CAN Gateway error stored due to the dealership’s wi-fi settings.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| BB29050 | Other | Aug 4, 2025 | 11021954 | PDF, 505 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 3 model years this bulletin names have filed 130 complaints with NHTSA since 2015. 57 of them name Electrical System — 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 blind spot monitor becomes inoperable when you leave the car in an open area with sun and warm weather on the car. If you take the car and place it in a garage or during nighttime the monitors will come back on. This problem was brought to the dealer, Gettel Acura, in XXX. They replaced a Chip and told me it was fixed.
2026 Acura MDX · Electrical System · filed with NHTSA Jul 3, 2026 · ODI 11748188
Autostart (stop/start) stopped engine but failed to restart car. Had to shut down computer and restart computer and then car started. Cars were coming around blind corner serving to avoid us. Has since happened multiple times just starting up vehicle (not involving autostart).
2025 Acura MDX · Electrical System · filed with NHTSA Jan 3, 2026 · ODI 11708571
In depth: 2025 Acura MDX electrical 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 electrical system
Source: same model, same component group24 other manufacturer communications filed against these Acura models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Acura list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B26-005 | Service bulletin | Oct 14, 2026 | Service Bulletin - Siri stops working when touching the display to interact with Wireless CarPlay. Siri can also freeze when reading a text… |
| 8A050-3BH-AA31 | Over-the-air update | Aug 20, 2026 | Over the Air System Updates - 2025–26 ADX: Software Update for Audio System software version 8A050-3BH-AA31. |
| BBTS30565 | Other | Apr 7, 2026 | Tech Line Summary - The vehicle's infotainment system displays previously viewed SMS messages upon each ignition cycle, when the customer's… |
| 8A050-TYA-A017 | Over-the-air update | Mar 10, 2026 | Over The Air System Updates - Vehicles equipped with the System Updates application are capable of downloading and installing Over the Air S… |
| 8A050-TYA-A016 | Over-the-air update | Jan 17, 2026 | Over the Air System Update - System updates contain upgrades that fix operational errors and/or provide a variety of enhancements, which add… |
| B25-042 | Service bulletin | Nov 11, 2025 | Service bulletin - When updating the Telematics Control Unit (TCU) with the i-HDS tool an Error message will appear. |
| B23-002 | Service bulletin | Jul 7, 2025 | Service Bulletin - Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due… |
| BTI&05162025901 | Other | May 16, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 MDX’s with a client complaint of no sound while making A… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Acura, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Acura BB29050 a recall?
No. A manufacturer communication 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 BB29050 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 BB29050 cover?
The manufacturer filed it against 3 model years: 2025 Acura ADX, 2026 Acura MDX, 2025 Acura MDX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.