Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Exterior Lighting
| Display of center display | Function | Settings |
|---|---|---|
| Automatic Headlight Sensitivity | Adjusts the sensitivity of the automatic headlight illumination feature. | Low/Medium-Low/Medium/Medium-High/High |
| Automatic Headlight Timeout | Sets the length of delay before headlights turn off. | 30 seconds/60 seconds/90 seconds/120 seconds/Off |
| Adaptive LED Headlights (ALH) | Switches between high and low beam automatically. | Enable/Disable |
| Adaptive LED Headlights (ALH) | Configures the use of Adaptive LED Headlights Marking Lights. | ALH: On, Marking Light: On/ALH: On, Marking Light: Off/Off |
| High Beam Control System (HBC) | Switches between high and low beam automatically. | Enable/Disable |
| Adaptive Front-Lighting System (AFS) | Adjusts lighting output based on driving conditions. | Enable/Disable |
| Daytime Running Lights (DRL) | Enables the daytime running lights. | Enable/Disable |
| Manual Headlight Leveling | Adjusts the headlight beam angle. | Headlight beam angle (11 levels) |
| Coming Home Light | Sets the length of delay before headlights turn off. | 30 seconds/60 seconds/90 seconds/120 seconds/Off |
| Leaving Home Light | Turns headlights on with unlock button press on key. | Enable/Disable |
| Restore | Restores exterior lighting settings to factory defaults. | Reset/Cancel |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.