I replaced mine today with a Denso 454-2036 carbon filter that I got delivered via ebay for $19.46. These are very high quality plastic framed filters made in Germany. Took about 20 minutes. The old one looked dirty and there were a few leave fragements in the compartment. I think places like Advance Auto can special order them also. It got rid of the stale air smell coming out of the ducts. A hand mirror and worklight and a #2 Phillips head screwdriver are all you need to do it. You remove the two screws at the front corners of the panel beneath the dash glove compartment, slide the holders for the access panel inside and remove, and rotate the old filter out and down. Reverse the process to install.