are you asking about the cabin air filter;
The filter is located under the passenger side of the dash and is moderately difficult to access and change. My old filter was black so am glad I invested the 2 hours to figure it out, though.
To remove the passenger side section of the dash it's first necessary to remove the raised center section, which requires sliding it towards the windshield. I did this by positioning the corner of one end of a small block of wood in the gap and gently tapping the other end with a hammer. Once loose it can be slid forward and lifted out of the way.
Next remove the torx screws and funny washers nearest the windshield. The passenger side dash can then be detached by slowly lifting the left side of it straight up and then sliding it to the left. After disconnecting the speaker lead this section of the dash can be moved out of the way.
Still another layer of plastic to take out: remove the 5 torx screws (2 forward, 3 aft) and jiggle the plate loose to expose the filter assembly.
To get the filter out push the tabs of the frame slightly forward, lift the frame up, and pull it towards you. With some jiggling the frame + filter will come out.
A couple of notes about installing the new filter: the arrows on the filter that indicate air flow should be pointing down when installed; the left and right sides of the frame extend down into the first and last pleats of the filter for proper positioning; the filter should be in the frame before placing it in the dash; it can take some finesse to properly position the filter and snap the frame in place; replacement filters can be purchased at a NAPA store, or online at www.micronair.us if you prefer OEM