The cabin air filter is located behind the glove box on the passenger side. To change it, lower the glove box, remove the filter housing cover, insert a new filter with the arrows pointing toward the blower, and reassemble.
Replacing the cabin air filter helps keep interior air clean and maintains HVAC efficiency. This guide covers the 2018 Accord, including where to find the filter, how to replace it, and tips for choosing the right filter and maintaining your system.
What you’ll need
Gather the right replacement filter and a few simple tools so you can complete the job without interruption.
- Fresh cabin air filter that fits your 2018 Honda Accord (preferably a genuine Honda or reputable aftermarket with activated carbon if you want extra odor control)
- Optional gloves to keep hands clean
- Flashlight or smartphone light to see inside the housing
- Microfiber cloth or small rag for wiping away dust
- Small flat-head screwdriver (optional, in case clips are stubborn)
With the right filter and a few basic tools, you’re ready to access the housing and swap in a new filter in just a few minutes.
Steps to replace the filter
Accessing the filter housing
The cabin air filter housing sits behind the glove box on the passenger side. You’ll need to open the glove box, release its stops, and gently lower the panel to reveal the filter cover.
Follow these steps in order to remove the old filter and install the new one with correct orientation.
- Park the car, set the parking brake, and turn off the engine.
- Open the glove box and gently apply downward pressure on the sides to detach the dampers and allow the door to drop fully.
- Look for the rectangular cabin air filter cover behind the glove box; release the clips or remove the cover by sliding or pulling as needed.
- Remove the old filter, noting which side is facing up and the direction of the arrows printed on the filter.
- Inspect the filter housing for debris; wipe it clean with a microfiber cloth if necessary.
- Install the new filter with the arrows pointing in the direction of airflow toward the blower motor (usually toward the center of the car). Make sure it sits flat and fully seated in the housing.
- Reattach the filter cover and secure the clips, then raise the glove box and reattach its dampers or stops.
- Test the HVAC by turning on the car and running the fan to confirm unobstructed airflow and that no debris is dislodged.
Completing these steps correctly ensures the new filter is properly positioned and the HVAC system operates efficiently.
Tips and maintenance
Filter types and replacement schedule
Choose between a standard non-activated carbon filter and a carbon/activated charcoal version for extra odor control. Honda typically recommends inspecting and replacing the cabin air filter at regular maintenance intervals, commonly every 12-15 months or about 15,000 miles, whichever comes first, with more frequent changes in dusty or high-pollen environments. Always consult your owner's manual for your specific trim and driving conditions.
- Replace the filter at the recommended interval or sooner if you notice reduced airflow or musty odors.
- Ensure the orientation arrows on the filter point toward the blower motor.
- Dispose of the old filter properly and keep the cabin area clean to reduce debris buildup.
- Consider doing the replacement with a second person to help manage the glove box safely if you’re new to this task.
Regular maintenance helps keep the interior air clean, reduces odors, and can improve HVAC efficiency over time.
Summary
For a 2018 Honda Accord, the cabin air filter lives behind the passenger-side glove box. A quick DIY replacement involves lowering the glove box, removing the filter cover, swapping in a correctly oriented new filter, and reassembling. Gather a suitable replacement filter, follow the step-by-step process, and recheck airflow after reassembly. When in doubt, reference the owner’s manual or consult a technician to ensure proper fit and interval recommendations.