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If you have a 2017 Mazda3, you'll need to reset the oil change light post each oil change to ensure the system tracks when the next one is needed. Neglecting to reset the light can cause the vehicle to prompt another oil change sooner than required. Resetting it is quick and simple. Begin by pressing and holding the "Trip" button with the ignition off. Keep holding the button as you turn the ignition to the "On" position without starting the engine. After 5 to 10 seconds, you'll see the Master Warning Light blink briefly, signaling that the oil light has been reset. You've successfully completed the process, so you can now turn off the ignition.
Here's a paraphrased and simplified version:
"To reset the oil light indicator in the 2017 Mazda 3, turn off the ignition and press down on the trip button for a few seconds. While still holding the trip button, turn the ignition back on. After 5 seconds, the master warning light will flash briefly to confirm the reset. Turn off the ignition, start the engine, and check to make sure the indicator has been reset.