What you need to do before you start

Changing your car's filters is one of the few maintenance tasks you can do yourself without special tools or a lift. You will need to locate two different filters: the engine air filter (which keeps dust out of the engine) and the cabin air filter (which cleans the air you breathe inside the car). Not every car has both, but most do. Your owner's manual tells you exactly where each one sits and how often to replace it — typically every 12,000 to 15,000 miles for the engine filter and every 12,000 to 24,000 miles for the cabin filter, though this varies by driving conditions.

Before you buy replacement filters, you need your vehicle's year, make, model, and engine size. Write this down or take a photo of your registration. Then go to an auto parts store (in person or online) and search for the correct filter part numbers. Buying the wrong filter wastes money and does not protect your engine or cabin. The filters themselves cost between $15 and $50 each, depending on your vehicle and filter quality.

Key Takeaways

  • The engine air filter usually sits in a plastic box under the hood and takes five minutes to swap; the cabin filter is often behind the glove box and takes ten to fifteen minutes.
  • You need only your hands and possibly a screwdriver — no special tools required for most vehicles.
  • Buying the correct part number for your specific year and model prevents installation mistakes and ensures proper fit.
  • Replacing filters on schedule keeps your engine running efficiently and improves the air quality inside your car.
  • If you cannot locate the filters or the clips are stuck, a mechanic can do the job for $50 to $150 per filter, including labor.

How to change the engine air filter

Open your hood and look for a black plastic box, usually near the top of the engine. This is the air filter housing. The box has a clip or latch on the side — press or unclip it to open the lid. Inside you will see the old filter, which looks like a pleated paper accordion. Lift it straight out and set it aside.

Before you install the new filter, look inside the empty housing and wipe out any loose dust or debris with a dry cloth. Then place the new filter into the housing, making sure it sits flat and the pleats are vertical (not bent). Close the lid and re-engage the clip or latch until you hear it click. Start your engine and listen for any unusual sounds — if everything sounds normal, you are done.

How to change the cabin air filter

The cabin filter is usually behind the glove box on the passenger side, though some vehicles place it under the hood or behind the dashboard. Check your owner's manual for the exact location. If it is behind the glove box, open the glove box fully and look for a release button or clip on each side. Press or pull these to unhinge the box and let it hang down. You will now see the filter housing.

The cabin filter slides into a slot horizontally. Note which direction the filter is facing (most have an arrow showing airflow direction) before you remove it. Slide the old filter out, wipe the housing clean with a dry cloth, and slide the new filter in, making sure the arrow points in the same direction as the old one. Close the glove box back into place and make sure it latches securely.

What to do if you get stuck

If the clips on the air filter housing are stuck or cracked, do not force them — you can break the housing and create an air leak. Instead, try spraying the clip with a penetrating oil (like WD-40) and waiting five minutes before trying again. If it still will not budge, stop and take the car to a mechanic.

If you cannot find the cabin filter or the glove box will not open far enough, your vehicle may have a non-standard design. Again, a mechanic is the safer choice. The cost to have both filters changed by a shop is typically $100 to $300 total, depending on your location and the shop's labor rate.

Signs your filters need changing sooner

If you drive in dusty, sandy, or heavily polluted areas, your filters may clog faster than the manufacturer's schedule suggests. A clogged engine air filter makes your engine work harder and can reduce fuel economy. A clogged cabin filter reduces airflow through your vents and makes the air inside smell stale. If you notice either of these problems before your scheduled interval, pull out the old filter and inspect it — if it looks dark or packed with dust, replace it.

Towing, driving on unpaved roads, or living in a high-pollen area also shortens filter life. In these cases, check your filters every 6,000 miles instead of waiting for the full interval. Some drivers in extreme conditions replace filters twice as often as the manual recommends, and that is a reasonable choice if you want to maintain peak engine performance and cabin air quality.

Disposing of the old filters

Old air filters are not hazardous waste and can go in your regular trash. However, many auto parts stores will take them back for free if you bring them in when you buy the new ones. Some recycling centers also accept them. Check with your local waste management program or call ahead to your parts store to confirm.

Keeping the old filter until you have bought the new one makes the return process straightforward — you can hand both to the counter staff at the same time. This also ensures you have the correct replacement before you remove the old one from your car.

Frequently Asked Questions

Can I clean and reuse my air filter instead of replacing it?

Engine air filters are designed to be replaced, not cleaned. Washing or blowing out a filter can damage the pleats and reduce its ability to trap particles. Cabin filters should also be replaced. Attempting to clean either one usually costs more in time than buying a new filter.

What happens if I drive with a clogged filter?

A clogged engine filter reduces airflow to the engine, making it work harder and burning more fuel. Over time, this can damage the engine. A clogged cabin filter straightforward makes your vents blow weaker and the air inside smell worse, but does not harm the car itself.

Do I need to reset anything after changing the filters?

No. Most modern cars do not require any reset or reprogramming after a filter change. straightforward install the new filter and drive normally. If your car has a maintenance reminder light, it may reset automatically after a few drive cycles, or you can reset it manually through the dashboard menu — check your owner's manual for the exact steps.

Is it cheaper to change filters myself or have a mechanic do it?

Doing it yourself costs only the price of the filters ($30 to $100 for both). A mechanic typically charges $50 to $150 per filter in labor, so the total runs $100 to $300. If you are comfortable working under the hood, the savings are significant. If you are unsure or uncomfortable, the mechanic's fee is worth the peace of mind.

How do I know which filter is which when I buy them?

Auto parts stores label filters clearly by vehicle year, make, and model. When you search online or ask at the counter, specify whether you need the engine air filter or cabin air filter. The part numbers are different, so you cannot accidentally buy the wrong one if you are clear about which filter you need.