How to Change Your Air Filter
Reviewed by GarageDex editorial
Your car has two air filters and both are quick DIY jobs. The engine air filter sits in the airbox under the hood and protects the engine; the cabin air filter is usually behind the glovebox and cleans the air you breathe. Neither needs tools on most cars - the only thing you need is the correct part for your vehicle.
Engine air filter
Under the hood, the airbox is held by clips or a couple of screws. Open it, note how the old filter sits, drop the new one in the same way, and close it up. Two minutes on most cars.
Cabin air filter
Usually behind the glovebox: empty the box, squeeze the sides so it swings down, and pull out the filter tray. Slide the new filter in following the airflow arrow, then reattach the glovebox.
Get the right part
Each uses a specific part number that varies by vehicle. Look up the exact cabin and engine air filter part numbers for your car - any quality brand that cross-references the OEM number will fit.
Frequently asked
What's the difference between the engine and cabin air filter?
The engine air filter cleans the air going into the engine for combustion; the cabin air filter cleans the air coming into the passenger compartment through the vents. They are different parts in different places and have separate replacement intervals.
How often should I change my air filters?
Engine air filter around every 30,000 miles, cabin air filter every 15,000-20,000 miles - sooner in dusty conditions or if you notice weak airflow or a musty smell.
Can I change air filters myself?
Yes, both are among the easiest car jobs - usually a few minutes with no tools. The cabin filter is behind the glovebox on most cars; the engine filter is in the airbox under the hood.
Need your car's exact spec? Find your air filter part numbers →