Parts for your 2020 Mazda 3-Air filter

2020 Mazda 3 air filter: what it does and when to replace it

Technical sources confirm the 2020 Mazda 3 is fitted with an engine air filter (often called the air cleaner element). The 2020 Mazda 3 Owner’s Manual (BP platform) lists inspection and replacement of the engine air cleaner under Maintenance and Care, the Mazda BP Workshop Manual covers Air Cleaner Element removal/installation and inspection, and Mazda Genuine Parts catalogues for the BP series show a specific engine air cleaner element for the 2.0, 2.5 and Skyactiv-X variants. So, yes—this model absolutely uses an engine air filter.

On the 2020 Mazda 3, the engine air filter sits in the airbox under the bonnet and screens out dust, pollen and grit before air reaches the intake, throttle body and combustion chambers. Keeping that intake charge clean helps protect the cylinders and the mass airflow sensor, steadies fuel trims, and supports smooth performance, better fuel economy and lower emissions. A healthy filter also keeps induction noise civil and reduces the risk of premature wear in dusty Aussie and Kiwi conditions.

For servicing, Mazda schedules inspection at regular service intervals, with replacement typically around the 30,000–50,000 km mark depending on conditions—earlier if the vehicle sees gravel roads, roadworks or farm tracks. Workshops generally check the pleats at each service, if the element is dark, clogged or damp, replacing it is cheap insurance. Most owners stick with a quality OEM or equivalent filter to maintain the correct flow and sealing.

• Common signs it’s due: a noticeable drop in pep, higher fuel use, a musty intake smell, or a visibly dirty/blocked element.
• Good practice: ensure the airbox lid is clipped evenly, the sealing gasket sits flat, and no leaves or debris are trapped inside.

While some reusable filters can be cleaned, the factory-style paper element on many 2020 Mazda 3s is designed to be replaced rather than washed. A fresh element is inexpensive and helps the Skyactiv engine breathe right through every kilometre.

FAQs

How often should the engine air filter be replaced on a 2020 Mazda 3?
Most workshops in Australia and New Zealand inspect it at every service and replace it roughly every 30,000–50,000 km, sooner for dusty driving. Always follow the vehicle’s logbook and local conditions.

Is the engine air filter the same as the cabin filter on a 2020 Mazda 3?
No. The engine air filter protects the engine, the cabin (pollen) filter cleans the air entering the heater/air-con for occupants. They live in different locations and have different service intervals.

Can the 2020 Mazda 3 engine air filter be cleaned instead of replaced?
The standard paper element is replace-only. Light tapping can dislodge loose dust, but washing or blowing with high-pressure air can damage the media. Replacing it is the safe bet.