2007 Ford Focus Locating engine air filter

Well starting with 2006 and later models ford discontinued cabin air filters (in focus). As for the Air cleaner element, I have had issues finding it as well. I believe it's a 30K mile change filter. I recommend when you find it using a high quality filter like K&N or equivalent, as you may have to remove the dirt barrier under the front bumper to access it. Because of low clearance, you also may need to raise the car on a lift or jack it.