The engine air filter element for the Skyactiv-G 2.5L I4 motor in a 2nd generation (2017, 2018, 2019, 2020, 2021 & 2022) Mazda CX-5 SUV should be changed every 22,500 miles (36,000 km) or every 36 months (3 years). Check out the DIY tutorial (with the part numbers) by clicking on the text link or thumbnail image below.