How often should the spark plugs be replaced on a Mazda Axela?

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Mazda Axela's spark plugs should be replaced every 40,000 kilometers, using genuine Mazda brand parts. The function of spark plugs is to discharge the high-voltage pulses delivered by the ignition wires, creating an electric spark that ignites the air-fuel mixture in the cylinder by arcing across the gap between the two electrodes. The Axela is a compact car produced by Changan Mazda, featuring a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with two Skyactiv-G gasoline engines. In terms of dimensions, the car measures 4662mm in length, 1797mm in width, and 1445mm in height, with a wheelbase of 2726mm. It is a four-door, five-seater sedan.