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How to Replace a 2003 Ford Focus PZEV 2 3L Air Filter

The air filter in the 2003 Ford Focus PZEV 2.3L is different from a standard filter. A standard filter is a small paper cartridge that is placed inside an air filter assembly. The Focus PZEV -- which stands for "partial zero emissions vehicle" -- uses an air filter box with a special nonserviceable foam element inside. In order to replace this filter, you have to replace the entire box, which is fairly expensive. But you should only have to replace the filter every 150,000 miles.

Instructions

1

Lift the hood of the Focus and prop it open.

2

Locate the air filter box. It is the large black box just behind the left headlight.

3

Unbolt the air filter box from the air intake hose using the socket wrench and socket.

4

Remove the air filter box from the engine bay and place the new one in its place.

5

Connect the new air filter box to the air intake hose and bolt it into place.