B10A3 on Mazda vehicles
B10A3 is named on 5 Mazda model years (2024–2025): 20 manufacturer filings and 0 owner reports in NHTSA’s files, across CX-90, CX-70, MX-5.
Which Mazda model years name B10A3
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 Mazda CX-90 | Exterior Lighting | 6 | — |
| 2025 Mazda CX-70 | Exterior Lighting | 5 | — |
| 2025 Mazda CX-90 | Exterior Lighting | 5 | — |
| 2025 Mazda MX-5 | Exterior Lighting | 2 | — |
| 2024 Mazda MX-5 | Exterior Lighting | 2 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Mazda filings that name B10A3
Source: NHTSA manufacturer communicationsBulletins and campaigns Mazda filed with NHTSA whose summary names B10A3. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 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.
- 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.
- 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.
- 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
- 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.
- 09-011-26 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
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. The record above is what Mazda and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs B10A3 a known problem on Mazda vehicles?
It is a documented one: NHTSA's files hold 20 manufacturer filings and 0 owner reports naming B10A3 on 5 Mazda model years (2024–2025). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Mazda models does B10A3 appear on most?
2024 CX-90 (6 documents), 2025 CX-70 (5 documents), 2025 CX-90 (5 documents).
Does B10A3 on a Mazda mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.