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
VIN information store function
- The SD card stores VIN information for the vehicle which is used by the SD card, and the SD card can only be used on the vehicle in which the VIN information has been stored.
NOTE:
- If an SD card is inserted into the USB port/SD card slot hub of the vehicle which contains information other than the VIN information stored in the SD card, "Invalid SD Card" is displayed in the center display.
- The VIN information stored in the SD card cannot be deleted or over-written.
- When any of the following conditions is met, the VIN information of the vehicle is stored in the SD card.
- Vehicle is driven approx. 100 km {62.1 mile}after inserting new SD card into USB port/SD card slot hub
- While traveled distance is less than approx. 100 km {62.1 mile} after inserting new SD card into USB port/SD card slot hub, SD card is inserted into USB port/SD card slot hub of another vehicle and ignition is switched to ACC or ON (engine off or on)
Factory Service Tools
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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.
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