Your filter is likely a "non-serviceable" foam filter that is supposed to last for 150K miles. To replace it, the entire assembly must be replaced and I have heard rumors of pricing in the $250 range.
There is no air filter on this model.
When you change the oil and oil filter.
I was looking in the 2006 Ford Focus owners manual and it shows that the air filter is a non - serviceable part . The air filter is designed to last the life of the vehicle . A Ford technician can check the diagnostic system to see if there is a possibility of an excessively dirty air filter
replace it
Dirty air filter
how change brake fluid . i have ford focus lx 2000.ans how change air filter.
That 2008 Ford F-350 does not have a cabin air filter.
On a 2002 Ford Focus : The Mass Air Flow sensor is between the engine air filter and the large diameter engine air intake tube * it is installed in the top section of the engine air filter housing
does not have a cabin filter
In the air filter box, under the hood, driver's side, behind the headlight area.
Fram Oil filter PH3600 Air Filter CA10242
Just after the air filter, toward the engine.