The 2023 Honda Civic has two separate air filters: the engine air filter in the engine bay and the cabin air filter behind the glove box. The engine filter keeps dirt out of the intake, while the cabin filter cleans the air you breathe inside the car. This guide walks you to their locations and how to replace them.
In the 2023 Civic, the engine air filter sits inside a rectangular housing in the engine bay, typically toward the front side of the engine compartment. The cabin air filter sits behind the glove box on the passenger side, filtering air before it enters the HVAC system. Below are practical steps to locate and replace both filters, with tips for a proper fit and routine maintenance expectations.
Engine air filter location
Overview: The engine air filter is housed in a rectangular plastic box in the engine bay. Access is gained by removing the lid of the air box, then replacing the filter with the orientation shown on the old filter.
Procedure to access the engine air filter:
- Park the car on a level surface, shut off the engine, and engage the parking brake. Open the hood and locate the engine air box, which sits near the front of the engine bay with a large intake hose connected to it.
- Unclip or unscrew the fasteners securing the air box lid. Depending on the trim, you may have spring clips or small screws; use the appropriate tool if screws are present.
- Lift the lid and carefully remove the old engine air filter. Note the exact orientation of the filter so you can install the new one the same way.
- Clean out any debris from inside the air box cavity if needed, using a clean cloth. Do not use compressed air inside the box.
- Insert the new filter in the same orientation as the old one, making sure it sits flat and completely seals against the box.
- Replace the air box lid and secure the clips or screws. Ensure the lid is snug and there are no loose parts.
Replacing the engine air filter is part of routine maintenance and should follow Honda’s recommended intervals, or sooner if you notice reduced performance or unusual intake noise. Check your owner's manual for the exact schedule and inspection cues.
Cabin air filter location
Overview: The cabin air filter is located behind the glove box on the passenger side. It filters air entering the cabin through the HVAC system and can become clogged in urban environments or with seasonal changes.
Procedure to access the cabin air filter:
- With the glove box open, inspect for any dampers or stoppers and remove them as needed to lower the glove box fully. In many Civics, you press in the sides of the glove box to release the stops so it can swing down.
- Look for a rectangular access door or cover on the passenger-side footwell area behind the glove box.Remove the cover to access the filter.
- Take out the old cabin filter, noting the direction of airflow indicated on the filter frame (usually an arrow).
- Insert the new cabin filter with the arrows pointing in the correct airflow direction (toward the HVAC system). If your Civic has an activated carbon option, the carbon side should face the blower side as instructed on the filter packaging.
- Reattach the filter cover, then lift the glove box back into place and re-engage any stoppers or dampers you removed.
Cabin filter replacement intervals vary by environment and model, but many Honda dealers recommend inspecting and replacing every 15,000 miles or about once a year under normal use. If you drive in heavy traffic, dusty conditions, or have allergies, you may want to replace more frequently. Always refer to the owner’s manual for the exact guidance for your trim level.
Summary
In the 2023 Honda Civic, the two air filters live in distinct locations for separate purposes: the engine air filter is in the engine bay’s air intake box, and the cabin air filter sits behind the glove box on the passenger side. Replacement is a straightforward DIY task with common hand tools, and following the correct orientation and securing fasteners ensures optimal performance. For precise intervals and any model-specific quirks, consult the owner’s manual or contact a Honda service advisor.