Mazda Spark Plugs set of 4. Keep your Mazda running in tip top shape. Get the best gas mileage you can with new plugs. Replace every 60,000 miles. Genuine Mazda 3 Accessories and Mazda 3 Parts offer the style, comfort, quality and satisfaction that make driving a Mazda 3 even more rewarding. Designed and guaranteed to fit your Mazda 3 perfectly inside and out, they are the only accessories built to the same quality standards as your Mazda 3.