Acura bulletin B24-047
What it saysA coaxial cable terminal was not manufactured to proper specifications. NHTSA’s full summary ↓
Acura filed this with NHTSA as a service bulletin dated Dec 18, 2024, received Aug 2, 2024, about the electrical system — 2 documents under this number. It names 3 model years (2022–2024). 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 Bulletin - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may lead to poor communication in the media-oriented system transport (MOST) bus network which can potentially affect the audio sound quality.
One of the 429 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 |
|---|---|---|---|---|
| B24-047 | Service bulletin | Dec 18, 2024 | 11012817 | PDF, 1,763 KB |
| B24-047 | Service bulletin | Jul 30, 2024 | 11005526 | PDF, 2,287 KB |
What the document itself lists
The manufacturer titles it “Warranty Extension: 2022–24 MDX Popping/Crackling from the Speakers;”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 39817-THR-305 | breakage during installation if too cold | — | eBay Motors → |
| 39165-THR-AB0 | FAKRA splice repair service cable (Green) | 5 | eBay Motors → |
| 39165-THR-AA0 | FAKRA splice repair service cable (Red) | 4 | eBay Motors → |
| 39165-THR-AC0 | FAKRA splice repair service cable (Blue) | 1 | eBay Motors → |
| 39540-TYA-AA2 | — | — |
Read by machine from the document NHTSA serves (18 pages), read Oct 4, 2026. A part number is shown only where it matches Acura’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 3 model years this bulletin names have filed 271 complaints with NHTSA since 2015. 42 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 contact owns a 2023 Acura MDX. The contact stated that while driving 40 MPH, on a rough road, the "Brake" warning light illuminated, then several warning lights illuminated. In addition, the contact stated the vehicle went into LIMP Mode and failed to accelerate as intended while depressing the accelerator pedal.
2023 Acura MDX · Electrical System · filed with NHTSA Jun 24, 2025 · ODI 11668974
All electrical systems failed while driving around 30mph, Power steering failed, power brakes failed, lane assist failed. We were at high risk of a crash due to lack of control of the car while driving. We were lucky that it happened on a flat road and we were able to manually pull over to the side of the road.
2022 Acura MDX · Electrical System · filed with NHTSA Jan 24, 2023 · ODI 11503425
Monday, June 30th, 2025, while driving on highway trip out of state, the vehicle made severe explosion noise, and sounded like I was dragging something metal under the vehicle for approx 30 seconds. After slowing the vehicle, I confirmed there was nothing under the car and the car seemed to be driving fine.
2024 Acura MDX · Electrical System · filed with NHTSA Jun 27, 2026 · ODI 11746956
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 group19 other manufacturer communications filed against the Acura MDX 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 |
|---|---|---|---|
| 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… |
| BB29050 | Other | Aug 4, 2025 | Tech Line - Customers may experience error code S001 with their audio unit. The vehicle may also have DTC B2B05-92 CAN Gateway error stored… |
| 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… |
| B24-058 | Service bulletin | Dec 17, 2024 | Service Bulletin - Under certain circumstances when reversing near a chain-link fence or highly reflective surfaces, a parking and back-up s… |
| ONL6M309172024 | Other | Sep 18, 2024 | Owner Notification Letter - A coaxial cable terminal was not manufactured to proper specifications. An improperly manufactured terminal may… |
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 B24-047 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 B24-047 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 B24-047 cover?
The manufacturer filed it against 3 model years: 2024 Acura MDX, 2023 Acura MDX, 2022 Acura MDX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.