What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
6Original wording in English
MAZDA
Reported code forms B10A3:86
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…
MAZDA
Reported code forms B10A3:86
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…
MAZDA
Reported code forms B10A3:86
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…
MAZDA
Reported code forms B10A3:86
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…
MAZDA
Reported code forms B10A3:86
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…
MAZDA
Reported code forms B10A3:86
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…
Check vehicle applicability
8A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mazda | CX-70 | 2025 |
| Mazda | CX-70 PLUG-IN HYBRID | 2025 |
| Mazda | CX-90 | 2025 |
| Mazda | CX-90 | 2024 |
| Mazda | CX-90 PLUG-IN HYBRID | 2025 |
| Mazda | CX-90 PLUG-IN HYBRID | 2024 |
| Mazda | MX-5 | 2025 |
| Mazda | MX-5 | 2024 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.