2007 Ford Focus Locating engine air filter

Hello,

Your air filter is inside the air filter box. Look for the big black air duct in your engine compartment: one side goes to the engine (throttle body), the other side goes to the air box.

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.