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 CX-3 AWDFACTORY OEM SERVICE PROCEDURE
Using M-MDS
- Connect the M-MDS to DLC-2.
- After the vehicle is identified, select the following items from the initial screen of the M-MDS.
- Select the "Module Programming".
- Select "Programmable Parameters".
- Select menu in the BCM.
- Select an item name, and then select option.
| M-MDS display | Function | Initial setting | Setting contents | Control unit |
|---|---|---|---|---|
| Auto Headlight On | Auto light sensitivity can be changed. | Standard (All Others) | Extra Low (Except Japan)/Low (All Others)/Standard (All Others)/High (Except Japan)/Extra High (Except Japan) | BCM |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.