The engine air filter and the cabin air filter can both be changed by a competent DIYer in about 15–25 minutes. The engine filter sits in the under-hood air box, while the cabin filter is located behind the glove box. This guide walks you through both replacements with clear steps and tips to ensure a proper fit and clean airflow.
Engine air filter replacement
Follow these steps to replace the engine air filter. You will need a new air filter of the correct size (OEM or equivalent) and a basic set of hand tools. No special tools are usually required beyond the filter and a rag to wipe the housing.
- Park on a level surface and turn off the engine. Open the hood and locate the rectangular air filter housing on the front-right side of the engine bay. It’s connected to a large intake hose.
- Unclip or loosen the fasteners securing the lid. The housing is typically held closed with a set of plastic clips (and sometimes a few screws); gently release them so you can lift the lid off.
- Lift the lid and remove the old filter. Take note of the orientation of the filter so you can install the new one in the same way.
- Inspect and clean the interior of the housing. Wipe away any dirt or debris with a clean rag or lightly vacuum the area to prevent contamination of the new filter.
- Check the filter for damage. If the filter is torn or very dirty, replace it with a new one.
- Install the new filter, making sure the orientation matches the old filter (airflow direction is usually indicated by arrows on the filter). The filter should sit flush in the housing.
- Reattach the lid and secure all clips or fasteners. Reconnect any hoses that were removed or loosened during the process.
- Close the hood and start the engine to listen for any abnormal vacuum leaks. If you hear a whistling noise, reseat the cover and clips to ensure a proper seal.
Regular engine air filter replacement helps maintain fuel efficiency and engine performance, especially in dusty conditions. Refer to your owner's manual for the recommended replacement interval for your driving environment.
Cabin air filter replacement
Replacing the cabin air filter improves interior air quality and helps your HVAC system run more efficiently. The cabin filter is located behind the glove box. Gather a replacement cabin air filter of the correct size (Honda OEM or equivalent) and a small flat tool if needed to release latches.
- Park the vehicle and turn off the engine. Open the glove box and clear its contents.
- Release the glove box stops. On many models, you’ll squeeze the sides of the glove box to disengage the stopping mechanism so the glove box can drop down or be removed slightly to reveal the filter housing.
- Remove the cabin filter cover. It is usually held in place with a few tabs or screws; gently detach the cover.
- Take out the old cabin filter. Note the orientation of the filter so you install the new one correctly (look for a molded “air flow” arrow on the filter).
- Clean the housing area if needed, removing any dust or debris that may have accumulated.
- Insert the new filter, ensuring it sits flat and the airflow arrows point in the direction of airflow through the vent system.
- Reinstall the cover and secure the glove box stops. Ensure the glove box can close properly without rubbing the filter housing.
- Close the glove box, press the HVAC controls, and verify that air flows smoothly from the vents with your climate settings.
Cabin air filter replacement is typically recommended every 15,000 miles or about once a year under normal conditions, and more often in dusty or urban environments. Check your owner’s manual for the exact interval as it can vary by trim and region.
Summary
For a 2020 Honda Pilot, you can confidently replace both the engine and cabin air filters at home. Start with the engine air filter in the under-hood intake box, taking care to reseal the housing after installation. Then access the cabin air filter behind the glove box, following the steps to remove and replace the filter with proper orientation. Using OEM or equivalent filters helps maintain performance, fuel efficiency, and interior air quality. Keeping to the recommended replacement intervals, and checking for any signs of seal wear or debris, will help ensure optimal HVAC performance and engine protection.