Change the air filter in your Ford Focus as part of your regular maintenance routine. That means about once a year, according to the book, "Auto Repair for Dummies." The air filter (or, more precisely, the air filter element) is critical on the vehicle. It removes harmful particles from the air before that air rushes into the engine and mixes with fuel. A dirty mixture can greatly hinder the engine's performance.
- Skill level:
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Things you need
- Flathead screwdriver
- Replacement air filter element
Raise the hood of your Ford Focus. Locate the air filter housing on the driver's side. It's a big box with what looks like a thick air duct leading out toward the engine.
Use your thumbs to remove the clamps on the air filter housing cover. On older Ford Focus models, instead of these clamps you'll find four screws; remove them with a flathead screwdriver.
Lift the cover off the air filter housing. Use care so you don't allow any debris to fall from the filter into the housing.
Remove the air filter element by hand and discard.
Place the new air filter element into the housing.
Set the cover back on top of the housing, making sure not to pinch the sides of the air filter element.
Refasten the clamps (or retighten the four screws) to secure the cover.
Tips and warnings
- Make sure you buy the correct air filter element. The wrong replacement could cause engine damage or void your car warranty, according to Ford.
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