When the Mazda 3 system senses that an oil change is due, a wrench indicator will appear on the instrument panel. Once service has been performed, you will need to perform an oil reset using these steps.
Mazda3
Replace Mazda Key Remote Battery
If your key fob isn’t working, it might be time to replace the batteries. But getting inside the remote flip key for certain Mazda models to replace the battery can be tricky. Here’s how it’s done.