Overview and location
The cabin air filter protects the interior from dust, pollen, and odors as air is drawn through the HVAC system. In the 2018 Fit, the filter is housed in a small compartment behind the glove box. Regular replacement helps maintain good airflow and cabin comfort, especially if you drive in dusty conditions or areas with wildfire smoke or heavy pollen.
What you’ll need
Gather these items before you begin to ensure a smooth replacement:
- New cabin air filter compatible with the 2018 Honda Fit (check model and correct size)
- Clean workspace with good lighting
- Optional: disposable gloves to keep hands clean
Having the correct filter and a clean area will help you complete the job quickly and avoid touching the filter media with dirty hands.
Filter orientation tips
Look for arrows on the filter indicating the direction of airflow. Install the new filter with the arrows pointing toward the HVAC unit (the dash). This ensures proper filtration and airflow.
Step-by-step replacement
Follow these steps to access, replace, and reinstall the filter correctly.
- Park the car, turn off the engine, and open the glove box.
- Gently squeeze the sides of the glove box to release the damper, allowing the glove box door to drop down.
- Locate the filter access panel behind the glove box and press the tabs or clips to open it.
- Note the orientation of the old filter (the arrows indicate airflow) and remove the old filter from the housing.
- Inspect the housing for debris; wipe it clean if needed before inserting the new filter.
- Insert the new filter with the orientation arrows pointing toward the HVAC unit, ensuring it sits flat with no gaps.
- Close the filter panel, lift the glove box back into place, and re-engage the damper by snapping the sides into position.
Once complete, replace any contents you removed and run the climate control to confirm airflow is normal and there are no unusual odors.
Maintenance tips
Replace the cabin air filter at regular intervals—typically every 15,000 to 30,000 miles or once a year, whichever comes first—though you may want to do it sooner if you notice reduced airflow, musty smells, or visible dirt. Use a filter with the correct size for the 2018 Fit and avoid reusing dirty filters, which can compromise air quality and HVAC performance.
Summary
Replacing the cabin air filter on a 2018 Honda Fit is a straightforward maintenance task that improves interior air quality and HVAC efficiency. By accessing the filter behind the glove box, installing a correctly oriented replacement, and reassembling, you can complete the job in roughly 10 minutes. Regular replacement helps keep the cabin fresh and the climate control functioning as designed.