What a cabin filter does and why it matters

Your Nissan Altima's cabin filter cleans the air that flows through your heating, cooling, and ventilation system before it reaches the interior. It traps dust, pollen, mold spores, and exhaust particles so you breathe cleaner air while driving. Over time the filter becomes clogged and restricts airflow, making your climate control work harder and pulling in more unfiltered air.

A clogged cabin filter is one of the easiest maintenance items to notice: your air conditioning blows weaker than it used to, the defroster takes longer to clear the windshield, or you smell stale air or odors from outside. Replacing it is straightforward enough that many owners do it themselves in 15 to 30 minutes, though you can also have a dealer or independent shop handle it.

Key Takeaways

  • Nissan recommends replacing the cabin filter every 15,000 miles or once per year, whichever comes first, though this varies by model year and driving conditions.
  • The cabin filter location depends on your Altima's generation: most models have it behind the glove box, but some have it under the hood near the windshield.
  • OEM Nissan cabin filters cost between $25 and $50, while aftermarket filters run $15 to $35 and often perform equally well.
  • Replacing the filter yourself requires no special tools beyond a screwdriver, but you must know your exact model year and engine size to order the correct part.

Cabin filter location by Altima generation

Where you find the cabin filter depends on which generation Altima you own. The easiest way to know is your model year, since Nissan redesigned the Altima in 2002, 2007, 2013, and 2019.

2002–2006 Altimas have the cabin filter behind the glove box on the passenger side. You remove the glove box by unclipping the sides, then slide the filter out of its housing. 2007–2012 Altimas also use the glove box location. 2013–2018 Altimas moved the filter to the same spot but made access slightly tighter. 2019 and newer Altimas place the cabin filter under the hood, mounted vertically near the windshield on the driver's side, which means you do not have to remove the glove box at all.

If you are unsure which generation you own, check your registration or owner's manual. The manual also includes a diagram showing exactly where the filter sits in your model.

Choosing between OEM and aftermarket filters

An OEM (original equipment manufacturer) cabin filter is made by Nissan or a supplier Nissan contracts with, and carries the Nissan part number. These filters cost $25 to $50 depending on your model year and where you buy them. Nissan dealerships typically charge the most; online retailers and warehouse clubs charge less for the same part.

Aftermarket filters are made by third-party manufacturers like Mann, Fram, Bosch, or Amazon Basics. They fit the same housing and meet the same size and airflow specifications, and usually cost $15 to $35. The main trade-off is warranty: OEM filters come with Nissan's backing, while aftermarket warranties depend on the manufacturer and retailer. In practice, most cabin filters last their full service life without defect, so the cost difference often matters more than the warranty.

A middle option is buying the OEM part number from an online retailer rather than a dealership. You get the genuine Nissan filter at a lower price than the dealer charges, though you lose the dealership's installation service if you want it.

Step-by-step replacement for glove box models

If your Altima is 2002–2018, follow these steps. You will need a Phillips screwdriver and the correct filter for your model year.

Step 1: Open the glove box and remove any items inside. Step 2: Locate the clips on both sides of the glove box frame. Press or unclip them (the exact mechanism varies by year) and gently lower the glove box. Step 3: Look for the filter housing behind where the glove box was. It is a rectangular plastic box, usually black or gray. Step 4: Slide or unclip the old filter out of the housing. Note which direction the arrow on the filter frame points — the new filter must go in the same direction. Step 5: Insert the new filter with the arrow pointing in the correct direction. Step 6: Reinstall the glove box by lifting it back into place and re-engaging the clips until they click.

The entire job takes 10 to 20 minutes. If the clips are stubborn or the glove box is difficult to lower, do not force it; a dealership or shop can do it without risk of breaking the plastic.

Replacement for under-hood models (2019 and newer)

If you own a 2019 or newer Altima, the cabin filter is under the hood near the windshield, which makes the job even faster.

Step 1: Open the hood and locate the filter housing on the driver's side, near the base of the windshield. It is a rectangular plastic box. Step 2: Unclip or unscrew the housing cover (most use clips, some use one or two screws). Step 3: Lift out the old filter and note the direction of the arrow. Step 4: Insert the new filter with the arrow pointing the same direction. Step 5: find the housing cover by re-engaging the clips or tightening the screws.

This location requires no interior disassembly, so the job typically takes 5 to 10 minutes. The trade-off is that the filter is more exposed to engine heat, so some owners find it easier to have a shop handle it if they are uncomfortable working under the hood.

Finding the correct part number for your Altima

Cabin filter part numbers are specific to your model year, engine size, and sometimes transmission type. Ordering the wrong number means the filter will not fit or will fit poorly.

The most reliable way to find your part number is to enter your vehicle information (year, make, model, engine size) into the Nissan parts website or a retailer like RockAuto, AutoZone, or Amazon. These sites will show you the correct OEM part number and compatible aftermarket options. You can also call a Nissan dealership parts department with your vehicle identification number (VIN), and they will give you the exact part number over the phone.

Do not assume that all Altimas of the same year use the same filter. A 2015 Altima with a 2.5-liter engine uses a different filter than a 2015 Altima with a 3.5-liter engine, even though both are the same model year. Verify your engine size before ordering.

Maintenance intervals and when to replace

Nissan's official recommendation is to replace the cabin filter every 15,000 miles or once per year, whichever comes first. However, this interval can be shorter if you drive in dusty conditions, live in an area with high pollen counts, or frequently drive in heavy traffic where you are exposed to more exhaust particles.

Some owners check the filter visually every 10,000 miles: if it looks dark or clogged, replace it early. Others follow the mileage interval strictly and replace it on schedule regardless of appearance. Either approach works; the key is not to ignore the filter for more than 20,000 miles or two years, because a severely clogged filter reduces airflow and forces your climate control system to work harder.

If you notice weak airflow from the vents, a musty smell, or reduced defroster performance, those are signs the filter needs replacement regardless of mileage. A new filter usually restores full airflow within a day of installation.

Frequently Asked Questions

Is the cabin filter the same as the engine air filter?

No. The engine air filter cleans air going into the engine for combustion; the cabin filter cleans air going into the passenger compartment. They are separate parts in different locations, and both need periodic replacement. The engine air filter is usually under the hood in a plastic box; the cabin filter is either behind the glove box or under the hood near the windshield.

Can I drive with a clogged cabin filter?

Yes, but you should not for long. A clogged filter reduces airflow and makes your heating and cooling less effective, and it forces the climate control blower motor to work harder, which can shorten its lifespan. Replace it as soon as you notice weak airflow or odors.

Do I need a dealer to replace the cabin filter, or can any shop do it?

Any shop can replace it, and many independent mechanics charge less than dealerships for the same job. If you are comfortable with basic tools, you can do it yourself in 15 minutes or less. The only reason to go to a dealer is if you want the OEM filter installed by someone familiar with your specific model year.

What happens if I install the cabin filter backward?

The filter will not work correctly and airflow will be restricted. The arrow printed on the filter frame shows the direction air should flow through it. If you install it backward, the filter will clog faster and your climate control will be weak. If you realize the mistake, straightforward remove the filter, flip it around, and reinstall it.

How much does a cabin filter replacement cost at a dealership?

Nissan dealerships typically charge $40 to $80 for the filter plus labor, depending on your model year and location. Independent shops usually charge $30 to $60 total. Doing it yourself costs only the price of the filter, which ranges from $15 to $50 depending on whether you choose an aftermarket or OEM part.