Mazda CX-3 2018 Owner's Manual page 344

Interior Features
Audio Set [Type B (touchscreen)]
PIN code reset
If the registered code has been forgotten,
reset the code to the default [0000] code.
1. Select the icon.
2. If the selected channel is locked, input
the PIN code to cancel the parental
lock temporarily.
3. Select .
4. Input the default code [0000] using the
number buttons.
5. Select .
6. Input the new PIN code using the
number buttons.
7. Select
.
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CX-3_8GA5-EA-17F_Edition1 2017-4-7 15:30:54