Mazda bulletin SA-034-25
What it saysSome vehicles equipped with the Adaptive Front lighting System (AFS) may exhibit the exterior light warning light/exterior light warning indication on while driving or when the ignition is turned on and DTC B10A3:86… NHTSA’s full summary ↓
Mazda filed this with NHTSA as a service bulletin dated Jul 31, 2025, received Aug 5, 2025, about the exterior lighting. It names 2 model years (2024–2025). 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 communicationSome vehicles equipped with the Adaptive Front lighting System (AFS) may exhibit the exterior light warning light/exterior light warning indication on while driving or when the ignition is turned on and DTC B10A3:86 (Error signal received from swivel actuator (LH)) is stored in memory.
Trouble codes it names: B10A3
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SA-034-25 | Service bulletin | Jul 31, 2025 | 11021396 | PDF, 161 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 2 model years this bulletin names have filed 8 complaints with NHTSA since 2015. 2 of them name Exterior Lighting — 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 vehicle has a recurrent malfunction of the Adaptive Front-lighting System (AFS), part of the exterior headlight system and advertised as a safety feature within Mazda’s i-ACTIVSENSE® technology. The failure presents as a dashboard warning stating: “Headlight System Malfunction.
2024 Mazda MX-5 · Exterior Lighting · filed with NHTSA Dec 20, 2025
After driving on slight up or down hill with headlights on, I'm getting Headlight malfunction warning on my almost brand new (700 miles) Miata
2025 Mazda MX-5 · Exterior Lighting · filed with NHTSA Jul 20, 2026
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 exterior lighting
Source: same model, same component group6 other manufacturer communications filed against the Mazda MX-5 under the same component group (exterior lighting), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SA-038-26a | Service bulletin | Sep 4, 2026 | This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 06/15/26 DESCR… |
| 09-023-26 | Service bulletin | Aug 12, 2026 | DESCRIPTION Some customers may complain that the Adaptive LED Headlights (ALH) aim upward for several seconds just before the vehicle comes… |
| 09-011-26 | Service bulletin | Feb 26, 2026 | This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 09-019/25 04/15/25 Some vehicles equi… |
| SA-023-25b | Service bulletin | Aug 22, 2025 | Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during… |
| 09-029-25 | Service bulletin | Jul 30, 2025 | Some customers may notice an abnormal noise (i.e. whine, groan, rattle or squeak) coming from the front combination lights when turning them… |
| SA-023-25a | Service bulletin | Jul 14, 2025 | Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mazda, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mazda SA-034-25 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 SA-034-25 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.
Which vehicles does SA-034-25 cover?
The manufacturer filed it against 2 model years: 2025 Mazda MX-5, 2024 Mazda MX-5. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.