The engine air filter is inside a rectangular plastic housing in the engine bay, on the passenger side. Access it by releasing the clips on the lid, lift the cover, replace the filter, and reseal.
What this guide covers
This article explains where the engine air filter sits, how to identify the air-filter housing, and how to replace the filter. It also clarifies the difference between the engine air filter and the cabin air filter, which is located behind the glove box.
Where to look in the engine bay
In the 2015 Civic, the engine air-filter box is a black rectangular housing secured with clips. It is typically found on the passenger side of the engine bay, near the front-right corner, and is connected to a large intake hose that runs toward the grille and to the throttle body.
- Rectangular black plastic housing roughly the size of a shoebox
- A large intake hose feeding the box from the grille and an outlet hose to the throttle body
- Lid secured with clips or occasional screws
When you locate the box, you’re ready to open it to inspect or replace the filter. Ensure the engine is off and cool before handling.
How to replace the engine air filter
Follow these step-by-step instructions to replace the engine air filter in a 2015 Civic. Note that exact fasteners may vary by trim or region.
- Park on level ground, engage the parking brake, and turn off the engine. Open the hood and locate the air-filter housing on the passenger side of the engine bay.
- Release the clips or remove the screws holding the lid, then lift the lid away from the box.
- Take out the old filter and inspect the box for debris or dirt. Wipe clean if necessary.
- Insert the new filter in the same orientation as the old one. Look for an airflow direction arrow and point it toward the throttle body.
- Reposition the lid, re-secure the clips or screws, and ensure the intake hose is properly attached.
- Close the hood and start the engine to confirm there are no unusual sounds or leaks.
Replacing the engine air filter helps maintain engine efficiency and performance and is a routine part of vehicle maintenance.
Cabin air filter reminder
The cabin air filter is a separate component located behind the glove box and filters air entering the passenger cabin. If you’re also due for cabin-filter maintenance, follow the vehicle’s manual for glove-box removal steps and filter replacement.
Summary
The engine air filter on a 2015 Honda Civic is housed in a rectangular black plastic box in the engine bay, on the passenger side. Access it by unfastening the lid’s clips, remove the old filter, insert the new one with the airflow arrow toward the throttle body, reseal, and close the hood. Remember to replace the cabin air filter separately if needed, as it sits behind the glove box.