How to Replace Your Engine Air Filter

A clogged engine air filter can hurt acceleration and fuel economy. It's one of the easiest maintenance items — on most cars you don't even need tools.

Don't confuse the engine air filter with the cabin air filter. This guide covers the engine air filter that feeds the motor.

What you'll need

• New engine air filter (correct part number)
• Screwdriver (only on some vehicles)

Steps

1. Locate the air box

   Open the hood and find the air box — usually a black plastic box on one side of the engine with a large hose leading to the intake.

2. Open the housing

   Release the clips (or remove the screws) that hold the air box lid and lift it open.

3. Remove the old filter

   Lift out the old filter and note which way it faces. Hold it up to the light — if you can't see light through it, it's overdue.

4. Clean the housing

   Wipe out any leaves or debris from inside the air box so nothing gets pulled into the engine.

5. Install the new filter

   Seat the new filter the same way the old one came out, with the sealing edge fitting flush in the box.

6. Close the housing

   Re-secure the lid with the clips or screws, making sure it sits flat with no gaps.

Frequently asked questions

How often should I change the air filter?

Typically every 15,000–30,000 miles, or sooner if you drive on dusty or dirt roads. Check it at each oil change.

Can a dirty air filter cause problems?

Yes — reduced power, worse fuel economy, and in extreme cases a rough idle. It's a cheap part with an outsized effect.