The engine air filter on a 2015 Nissan Altima sits inside a rectangular plastic housing in the engine bay, on the driver's side near the front of the compartment. The cabin air filter, by contrast, lives behind the glove box. This article explains where to find the engine filter and how to replace it.
Engine air filter location
In the 2015 Altima, the engine air filter is housed in a rectangular black plastic box connected to the intake hose that leads to the throttle body. The housing is typically secured with clips or small screws, making access straightforward for a routine replacement.
What you’ll need to know before you start:
- Park on a level surface, set the parking brake, and turn off the engine. For safety, let the engine cool briefly if it’s been running.
- Open the hood and locate the air filter housing. In most 2015 Altima models, it sits on the driver’s side of the engine bay, near the front, connected to a large intake hose.
- Release the clips or screws securing the lid. Depending on the model, you may need a flat-head screwdriver or a small socket driver.
- Lift the lid and remove the old filter. Note the orientation of the filter so you can install the new one the same way.
- Inspect the old filter for excessive dirt or damage. If it’s dirty or torn, replace it with a new filter of the correct size.
- Install the new filter in the same orientation, reseal the housing, and secure the lid with the clips or screws.
- Close the hood and start the engine to verify normal operation and ensure no loose parts are rattling.
If you’re not comfortable performing the replacement yourself, a quick trip to a service shop can handle it. Always refer to the owner’s manual for specifics on your exact trim and engine type.
Cabin air filter location (for reference)
There is another filter in the Altima—the cabin air filter—which is a separate component from the engine air filter. It sits behind the glove box and cleans the air entering the cabin through the HVAC system.
To locate and replace the cabin filter:
- Turn off the car and open the glove box. Gently push in the sides to release the stops and lower the box.
- Look for a panel or cover at the back of the glove box that hides the cabin filter; remove or unclip it.
- Remove the old filter, noting the correct orientation for a new filter.
- Insert the new cabin filter with the arrows pointing in the direction of airflow (usually toward the back of the car).
- Reattach the cover and glide the glove box back into place.
Replacement intervals for the cabin filter are typically every 15,000 to 30,000 miles depending on driving conditions, but always consult the owner’s manual for the recommended schedule.
Summary
For a 2015 Nissan Altima, the engine air filter sits in a rectangular housing in the engine bay on the driver's side near the front. Replacing it involves opening the housing, removing the old filter, and installing a new one in the correct orientation. The cabin air filter is located behind the glove box and follows a similar replacement process. Regular inspection and timely replacement help maintain engine performance and cabin air quality.