Changing your engine air filter is a small task that can have a big impact on engine performance and longevity. For optimal engine health, it's recommended that the engine air filter be replaced every 12 months or 12, 000 miles. Most engine air filters are very easy to change – requiring few, or no tools and only a few minutes of your time. ECOGARD XA10597 COMPATIBLE WITH: Mazda 6 2. 5L 2018-2019 Mazda CX-9 2. 5L 2016-2019