OE Number

4S4Z9600AB, 4S4Z 9600 AB

4S4Z9600AC, 4S4Z 9600 AC

4S4Z9600BA, 4S4Z 9600 BA

4S4Z9600AA, 4S4Z 9600 AA

6S4Z9600A,  6S4Z 9600 A

319-00529, 31900529

319-00640, 31900640

258-519, 258519

FO3990100

Will fit following models

Ford Focus 2005-2007

Ford Focus 2008-2009 [Low Emission PZEV models only]

Package includes:
1 Air Cleaner Filter Box (No Included Filter element)

What is an air filter box and where is it located?

The air cleaner housing assembly (also commonly referred to as an air box or air filter housing) houses and protects the air filter from the various harsh elements that could potentially weaken and damage it.
This allows the air filter to do its job of filtering out any impurities in the air before it flows into the engine. The air box can usually be found near the front of the fender, inside the engine compartment.
A typical air filter housing will have an air inlet on one side of the filter to allow in the fresh air and an outlet on the other side of the box that goes to the air intake hose leading to the throttle body on the engine.
Some air filter boxes may also have baffles inside to quiet engine noise, air intake temperature sensors, or mass air flow sensors.

Package includes:

Just as pictures shown