The cabin air filter in a 2009 Nissan Altima is located behind the glove box on the passenger side. To access it, lower the glove box and remove the filter housing cover.
In this guide, you’ll learn exactly where to look, what tools you’ll need, and how to replace the filter step by step. We’ll also share tips to ensure a proper seal and optimal airflow.
Location and access
On the 2009 Altima sedan, the cabin air filter sits in a rectangular housing behind the glove box on the passenger side. Access requires opening the glove box, releasing its stops, and dropping the box down to reveal the filter cover and housing.
What you’ll need
Gather these items before you start to make the replacement smooth and straightforward.
- Replacement cabin air filter compatible with 2009 Altima (OE Nissan part or an equivalent size and spec)
- Flat-head screwdriver or trim tool (optional, to release clips)
- Flashlight for better visibility inside the dash area
- Clean rag to wipe the filter housing and surrounding area
Having the correct size filter and the right tools helps prevent damage to the housing and ensures proper airflow once installed.
Step-by-step replacement
Follow these steps to access, remove, and replace the cabin air filter, then reassemble the glove box.
- Open the glove box and remove its contents.
- Squeeze the sides of the glove box to disengage the stops and let the box drop down fully, exposing the filter housing.
- Locate the rectangular filter cover on the right side of the opening and release it by pressing the tabs or prying gently with a tool.
- Remove the old filter and inspect the housing for debris. Note the orientation of the filter (airflow arrows should point toward the blower, typically toward the dash).
- Wipe the housing clean with a rag to remove dust and dirt.
- Install the new filter in the same orientation, making sure it sits flat and fully seated in the housing.
- Reattach the filter cover, then raise the glove box until it clicks back into place and re-engages the stops.
Test the system by turning on the climate control to confirm air is flowing properly with the new filter and that there are no unusual noises or odors.
Orientation tips and maintenance
Pay attention to the airflow arrows on the filter during installation. If you notice reduced airflow after replacement, double-check that the filter is seated correctly and that the housing is clean and undamaged. In dusty or high-pollen environments, consider replacing the filter more frequently—typically every 12 months or 12,000–15,000 miles, or sooner if you notice decreased airflow or odors.
Summary
For a 2009 Nissan Altima, the cabin air filter is hidden behind the passenger-side glove box. With the right tools and a few careful steps—dropping the glove box, removing the filter cover, swapping in a correctly oriented filter, and reassembling—you can complete the replacement in a short drive-time window. Regular replacement helps maintain cabin air quality and HVAC performance.