i think oreilly's sells the WIX unit. i have used this unit and the oem unit, both have similar function, endurance and cost. The construction of the wix unit seems to be more solid.
personally, i change the cabin air filter out every 10k miles, which coincides with my oil change interval. Sometimes, if there is a lingering odor in my car, will change it out sooner. I also try to vacuum through as much of the system as possible with my attachments. I find it helps a lot to remove any piled up leaves on the intake vent as well.
2012 Kia Sportage SX FWD, Silver, Leather, UVO, keyless entry.
no sunroof, no nav, no interior led lighting, no heated/cooled seats.
Last edited by cloud9utk; 11-13-2012 at 09:17 AM.