Ford Focus III (2011-2021) engine air filter replacement diagrams & schemes

When changing the air filter element in your Ford, use only the air filter element listed in the Motorcraft Parts table below.

For EcoBoost equipped vehicles: When servicing the air cleaner, it is important that no foreign material enters the air induction system. The engine and turbocharger are susceptible to damage from even small particles.

How to replace the engine air filter?

1. Open the engine compartment. The engine air filter is located on the right side.

2. Loosen the four fasteners and remove the air cleaner assembly lid.

3. Remove the air filter element from the air filter housing.
4. Wipe any dirt or debris from the air cleaner assembly to make sure no dirt gets in the engine and to make sure you have a good seal

5. Install the new air filter element. Slide the open end of the air filter element in first, below the tab. Then push the closed end of the air filter into the bottom of the tray. The closed-end should fit inside the groove in the tray. The tab of the closed end of the air filter should be oriented down and fit between the forks on the tray as shown at the arrow above. Make sure you align the tab in the air filter element with the fork in the air cleaner assembly tray
6. Install the air cleaner assembly lid and tighten the four fasteners.

Engine air filter location

The engine air filter is located on the right side of the engine compartment.

Spec

MOTORCRAFT PARTS - 1.0L ECOBOOST™

MOTORCRAFT PARTS - 2.0L DURATEC-HE (MI4)

The air filter directly affects the correct operation of the engine. It prevents the engine from getting inside the dirt. An air filter is fitted to each Ford Focus. The engine air filter should be replaced approximately every 20,000 km. However, it is a good idea to replace the air filter more often, especially if the car is driven in a dusty environment. The air filter should be replaced when you notice a drop in engine power, increased fuel consumption, or rough engine operation.