In the 2018 Honda Accord, there are two air filters: one for the engine and one for the cabin.
What filters does it have?
Two main air filtration components are standard on the 2018 Accord: the engine air filter and the cabin air filter. The engine air filter screens dust and debris from the air the engine intakes, helping maintain performance and efficiency. The cabin air filter cleans the air entering the passenger compartment via the HVAC system, improving interior air quality and reducing irritants.
- Engine air filter — located in the engine compartment, typically within a rectangular housing. Replacing it involves opening the housing, removing the old filter, and installing a new one with the correct airflow orientation.
- Cabin air filter — located behind the glove box. Access usually requires lowering or removing the glove box, removing a cover, and swapping in a new filter. Some models use a two-piece filter; follow arrows and reseal the housing to prevent unfiltered air from bypassing the filter.
These two filters work together to protect engine performance and maintain interior air quality for occupants.
Where to find and how to replace
Each filter has a specific location and replacement approach. Here are the basics for the 2018 Accord:
Engine air filter
Typically sits in a rectangular housing in the engine bay. Access the housing, remove the old filter, inspect for damage, and insert a new filter with the airflow arrows aligned correctly. Reseat the housing securely to prevent unfiltered air from leaking in.
Cabin air filter
Usually located behind the glove box. You may need to release the glove box stop or hinge it down, then remove a filter cover and swap in a new filter. Ensure the filter is oriented as indicated by the arrows and reassemble the housing so the HVAC system draws filtered air.
Maintenance and replacement intervals
Replacement intervals vary by model, engine type, and driving conditions. The following guidelines reflect typical practice for the 2018 Accord under normal conditions, with adjustments advised for dusty or urban environments. Always check your owner’s manual for the exact schedule for your trim and region.
- Engine air filter: about 30,000 miles (48,000 km) under normal conditions; replace sooner in dusty or harsh environments.
- Cabin air filter: about 15,000 miles (24,000 km) or 12 months, whichever comes first; more frequent changes may be needed in cities with heavy pollution or dusty roads.
Consult the owner’s manual or a dealer for exact intervals tailored to your vehicle and local conditions.
Summary
The 2018 Honda Accord uses two air filters—an engine air filter and a cabin air filter—to protect performance and improve interior air quality. The engine filter is located in the engine bay, while the cabin filter sits behind the glove box. Replacement intervals are typically around 30,000 miles for the engine filter and 15,000 miles or 12 months for the cabin filter, but these can vary. Regular checks and replacements help maintain efficiency and comfort.