How to Maintain and Replace the 2015 Nissan Altima Cabin Air Filter: A Comprehensive Guide

2025-12-03

If you own a 2015 Nissan Altima, ensuring your cabin air filter is clean and functional is one of the simplest yet most impactful ways to protect your health, improve interior air quality, and keep your vehicle’s HVAC system running efficiently. Over time, this often-overlooked component traps dust, pollen, exhaust fumes, and other airborne particles, but when it becomes clogged, it can lead to musty odors, reduced airflow, and even respiratory irritation. This guide will walk you through everything you need to know about the 2015 Nissan Altima cabin air filter—from why it matters to how to replace it yourself, with tips to choose the right replacement and avoid common mistakes.

Why the 2015 Nissan Altima Cabin Air Filter Matters More Than You Think

The cabin air filter in your 2015 Altima is a small but critical part of your vehicle’s heating, ventilation, and air conditioning (HVAC) system. Located behind the glove box, it acts as a barrier between the outside air and your car’s interior, filtering out pollutants before they enter through the vents. Here’s why it deserves your attention:

1. Protects Your Health

The air inside your car can be up to five times more polluted than outdoor air, thanks to exhaust from nearby vehicles, industrial emissions, pollen, mold spores, and even dust kicked up from roads. The 2015 Altima’s cabin air filter captures these particles, reducing your exposure to allergens and irritants. For drivers or passengers with allergies, asthma, or sensitivity to pollutants, a clean filter can mean fewer sneezes, less congestion, and easier breathing during drives.

2. Improves HVAC Efficiency

A clogged filter forces your Altima’s blower motor to work harder to push air through the restricted space. This not only reduces airflow (making it harder to cool or heat the cabin) but also strains the system, potentially leading to higher energy consumption and premature wear on components like the blower motor or evaporator core. Over time, this can result in costly repairs.

3. Eliminates Unpleasant Odors

As the filter traps debris, it can become a breeding ground for bacteria, mildew, or mold—especially if it gets damp from rainwater or snow entering the HVAC system. A dirty filter often emits a musty, earthy smell that permeates the cabin. Replacing it eliminates this odor and prevents its return.

How to Tell If Your 2015 Nissan Altima Cabin Air Filter Needs Replacement

Even if you don’t notice symptoms immediately, experts recommend inspecting your 2015 Altima’s cabin air filter every 12,000 to 15,000 miles (or every 12 months), depending on driving conditions. Here are the key signs it’s time for a replacement:

1. Reduced Airflow from Vents

If you turn on the AC or heat and notice the air coming through the vents feels weaker than usual, a clogged filter is often the culprit. The restricted airflow can’t push enough air into the cabin, making it harder to regulate temperature.

2. Musty or Foul Odors

A persistent “old sock” or damp smell when the HVAC is running is a red flag. This odor comes from moisture trapped in the filter, which promotes microbial growth. If you’ve recently driven through heavy rain or parked in a humid area, this symptom may appear faster.

3. Increased Allergy or Respiratory Symptoms

If you or your passengers start experiencing more sneezing, coughing, or nasal congestion during drives—especially during high-pollen seasons—it could be due to a filter that’s no longer trapping allergens effectively.

4. Visible Debris on the Filter

To check manually, follow these steps:

  • Open the glove box and empty it.

  • Squeeze the sides of the glove box to release the stops, then lower it completely.

  • Behind the glove box, you’ll see a rectangular plastic cover holding the cabin air filter. Remove the screws or clips securing it.

  • Pull out the old filter and hold it up to a light. If it’s covered in thick dust, dirt, or discoloration (often gray or black), it’s time to replace it.

Step-by-Step Guide to Replacing the 2015 Nissan Altima Cabin Air Filter

Replacing the cabin air filter in a 2015 Altima is a straightforward DIY job that takes about 15–20 minutes. You don’t need advanced mechanical skills—just basic tools and attention to detail. Here’s how to do it:

Tools and Materials You’ll Need

  • A new cabin air filter (more on choosing the right one later).

  • A Phillips-head screwdriver (optional, depending on your filter cover).

  • A clean rag (to wipe away debris).

Step 1: Prepare the Vehicle

Park your Altima on a flat surface and turn off the engine. Open the glove box and remove all items inside—this gives you space to maneuver.

Step 2: Lower the Glove Box

Squeeze the left and right sides of the glove box inward to disengage the plastic stops that hold it in place. Lower the glove box until it hangs freely. You should now see the cabin air filter housing—a rectangular black plastic box with a hinge on one side.

Step 3: Remove the Filter Cover

The housing is held shut by either screws or spring-loaded clips. If it uses screws, use your Phillips-head screwdriver to remove them. If it has clips, press both sides inward simultaneously to release them. Gently pull the cover away from the housing.

Step 4: Take Out the Old Filter

Slide the old filter out of the housing. Note the direction of the airflow arrow printed on the filter frame—this is crucial for installing the new one correctly. The arrow should point downward (toward the blower motor) in most 2015 Altimas.

Step 5: Clean the Housing

Use a clean rag to wipe away any loose debris, dust, or dirt from the inside of the filter housing. This ensures no particles fall onto the new filter once it’s installed.

Step 6: Install the New Filter

Take your new cabin air filter and align the airflow arrow with the direction indicated in the housing (usually downward). Slide it into place until it sits flush with the housing.

Step 7: Reassemble the Cover and Glove Box

Put the filter cover back on, securing it with screws or clips as you removed them. Lift the glove box back into position until the stops click into place. Close the glove box and test the HVAC system to ensure air is flowing properly.

Choosing the Right Cabin Air Filter for Your 2015 Nissan Altima

Not all cabin air filters are created equal. To get the best performance and longevity, consider these factors:

1. OEM vs. Aftermarket

  • OEM (Original Equipment Manufacturer):​ Made by Nissan or a licensed partner, these filters are designed to fit your 2015 Altima perfectly. They’re reliable but often pricier.

  • Aftermarket:​ Brands like Fram, Mann-Filter, and Bosch offer high-quality alternatives. Look for ones labeled specifically for the 2015 Nissan Altima to ensure proper fit. Many aftermarket filters cost 30–50% less than OEM but match or exceed their performance.

2. Filter Type

Cabin air filters come in three main types:

  • Standard/Non-Pleated:​ Basic filters made of paper or synthetic material. They trap large particles like dust but are less effective against smaller allergens. Best for low-pollution areas or drivers on a budget.

  • Pleated Cotton/ Synthetic:​ These have a folded design that increases surface area, allowing them to capture smaller particles like pollen and mold spores. They’re a good middle ground for most drivers.

  • Activated Carbon:​ Infused with activated carbon, these filters neutralize odors (from smoke, pets, or exhaust) in addition to trapping particles. Ideal for urban drivers or those sensitive to smells.

3. MERV Rating

MERV (Minimum Efficiency Reporting Value) measures a filter’s ability to capture particles. For a 2015 Altima, aim for a MERV rating of 8–11:

  • MERV 8–9: Captures 80–90% of particles 3–10 microns (dust, pollen).

  • MERV 10–11: Captures 90–95% of particles down to 1–3 microns (mold spores, pet dander).

Higher MERV ratings (above 11) are rare in cabin filters and may restrict airflow, so avoid them unless specified by your mechanic.

Common Mistakes to Avoid When Replacing Your 2015 Altima’s Cabin Air Filter

Even a simple job can go wrong if you’re not careful. Here are pitfalls to skip:

1. Installing the Filter Backward

The airflow arrow is there for a reason—if you install the filter backward, air bypasses the filter media, rendering it useless. Always double-check the direction before sliding it in.

2. Ignoring the Housing Cleanliness

A dirty housing can contaminate the new filter immediately. Wipe it out with a rag to remove loose debris before installation.

3. Using the Wrong Size

While most 2015 Altimas use the same filter size (typically around 200x200x30mm), double-check your vehicle’s VIN or consult a parts store to confirm. Using an ill-fitting filter can leave gaps, allowing unfiltered air to enter.

4. Forgetting to Reset the Maintenance Reminder

Some 2015 Altimas have a cabin air filter replacement reminder in the infotainment system. After replacing the filter, use your NissanConnect app or visit a dealer to reset this alert—otherwise, it may keep nagging you unnecessarily.

Frequently Asked Questions About the 2015 Nissan Altima Cabin Air Filter

Q: How often should I replace the cabin air filter in my 2015 Altima?

A: Nissan recommends replacing it every 12,000–15,000 miles or once a year, whichever comes first. If you drive in dusty, polluted, or high-pollen areas, check it every 6 months.

Q: Can I drive with a dirty cabin air filter?

A: Technically, yes—but it’s not advisable. A clogged filter reduces HVAC efficiency, worsens air quality, and may lead to musty odors or mold growth over time.

Q: Will replacing the filter void my warranty?

A: No—maintaining your vehicle, including the cabin air filter, is part of routine care. In fact, neglecting it could void warranty claims related to HVAC issues.

Q: My Altima still smells bad after replacing the filter. What now?

A: Persistent odors may indicate mold or mildew in the HVAC system itself. Consider having a professional clean the evaporator core or ducts.

Final Thoughts: Keeping Your 2015 Altima’s Cabin Air Fresh

The cabin air filter in your 2015 Nissan Altima is a small component with big responsibilities. By checking it regularly, replacing it when needed, and choosing the right filter for your driving conditions, you’ll enjoy cleaner air, better HVAC performance, and fewer unpleasant surprises. Whether you tackle the replacement yourself or leave it to a mechanic, prioritizing this maintenance task will pay off in comfort, health, and long-term savings.

Don’t wait until you’re sneezing or smelling mustiness—grab a new filter today and take control of your Altima’s cabin environment.

BACK