Mazda CX-52017 Owner's Manual page 202

When Driving
Switches and Controls
▼ Erasing Programmed HomeLink
Buttons
To erase the existing programming from
all three operating channels, press and
hold the two outside buttons ( , ) on
the auto-dimming mirror until the
HomeLink indicator light begins to flash
after approximately 10 seconds.
Verify that the programming has been
erased when you resell the vehicle.
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