The cabin air filter is located behind the glove box on the passenger side; access it by lowering the glove box and removing a small cover. This guide explains exactly where to look and how to replace it.
Location and access
In the 2021 Mazda CX-5, the filter sits in a rectangular housing behind the glove box on the passenger side. Access is achieved by lowering the glove box and removing the end-panel cover to reveal the filter. Most owners can do this without tools; some models may require a quick release of the glove box damper.
To access and replace the filter, follow these steps:
- Open the glove box, then gently press in the sides to release the stops and let the box swing down or fully drop (if your model uses a damper, disconnect or release it as needed).
- Locate the filter housing on the passenger-side end of the dash; remove the housing cover by unlatching or unclipping it.
- Take out the old cabin air filter and note the orientation arrows on the filter.
- Insert a new filter with the arrows pointing toward the blower motor, reseal the housing, and reattach the cover.
- Lift the glove box back into place, reattach the damper if you removed it, and run the HVAC to confirm air flow.
Replacing the cabin air filter is a routine maintenance task that can improve cabin air quality and HVAC performance. Mazda commonly recommends inspecting and replacing the cabin air filter every 12,000 to 15,000 miles, or annually, with more frequent changes in dusty or high-pollen environments.
Filter options and maintenance tips
When shopping for a replacement, choose a cabin air filter designed for the CX-5 model year 2021. Options include standard filters and activated charcoal versions that help reduce odors. Ensure proper fitment by checking the part number or using a filter labeled for Mazda CX-5 2021. Install with the airflow arrows toward the blower motor, and always reseal the housing completely before closing the glove box.
Summary
For a 2021 Mazda CX-5, the cabin air filter is tucked behind the glove box on the passenger side. Access requires lowering the glove box, removing the filter cover, and swapping in a new filter with arrows directed toward the blower. Regular replacement—roughly every 12,000–15,000 miles or once a year, more often in dusty conditions—helps maintain clean cabin air.