B10A3
0 owner reports and 20 manufacturer filings across 5 model years from Mazda.
Where B10A3 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2024 Mazda CX-90 | Exterior Lighting | 6 | — | Headlight assembly → |
| 2025 Mazda CX-70 | Exterior Lighting | 5 | — | Headlight assembly → |
| 2025 Mazda CX-90 | Exterior Lighting | 5 | — | Headlight assembly → |
| 2025 Mazda MX-5 | Exterior Lighting | 2 | — | Headlight assembly → |
| 2024 Mazda MX-5 | Exterior Lighting | 2 | — | Headlight assembly → |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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B10A3 by make
The same record, one make at a time: the model years, bulletins and owner reports that name B10A3 on that maker’s vehicles.
What it gets filed under
20 manufacturer filings name B10A3. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names B10A3.
- 09-011-26 Service bulletin2026-02-26 · Exterior Lighting
- This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 09-019/25 04/15/25 Some 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)) stored in me
- SA-034-25 Service bulletin2025-07-31 · Exterior Lighting
- Some 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.
- 09-019-25 Service bulletin2025-04-16 · Exterior Lighting
- Some 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)) stored in memory. NOTE: The combination light with AFS can be distinguished if it is equipped with the parking light/daytime running l
- 09-039-24 Service bulletin2024-08-10 · Exterior Lighting
- Some 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)) stored in memory.
- SA-030-24a Service bulletin2024-07-25 · Exterior Lighting
- Some vehicles may experience a warning light ON, warning messages, or a headlamp concern. After checking the vehicle, DTC B10A3:86 may be stored with or without other DTCs. Follow the repair procedure below for B10A3:86. Customers having this concern should have their vehicle repaired using the following repair procedure.
- SA-030-24 Other2024-06-01 · Visibility/Wiper
- Some vehicles may experience a warning light ON, warning messages, or a headlamp concern. After checking the vehicle, DTC B10A3:86 may be stored with or without other DTCs. Follow the repair procedure below for B10A3:86. Customers having this concern should have their vehicle repaired using the following repair procedure.
What B10A3 means
Source: SAE J2012 / OBD-IIB10A3 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about B10A3
Source: NHTSA files and the OBD-II standardWhy does this page not define B10A3?
Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.
Can I keep driving with B10A3 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.