The 2008 Nissan Altima is equipped with a cabin air filter located behind the glove compartment, which should be replaced every 12,000-15,000 miles or at least once a year to maintain optimal air quality and HVAC system performance. This essential component filters dust, pollen, and other contaminants from the air entering your vehicle's interior. Replacing it is a straightforward DIY task that typically takes 30-40 minutes and requires no special tools, costing only

Understanding the Cabin Air Filter in Your 2008 Nissan Altima

The cabin air filter, also known as the dust filter, HVAC filter, or pollen filter, serves a critical role in maintaining your vehicle's interior air quality. Unlike the engine air filter, which cleans air entering the engine, the cabin air filter specifically cleans the air that you and your passengers breathe inside the vehicle. This filter traps harmful particles including dust, pollen, mold spores, and other allergens before they can circulate through your heating and air conditioning system .

The 2008 Nissan Altima typically comes with a standard particulate cabin air filter, though activated carbon filters are also available as aftermarket options. The standard filter effectively traps dust, pollen, and other allergens, while carbon-enhanced filters provide additional protection by reducing outside odors and fumes . These filters work through a series of pleats or layers that increase the surface area for trapping particles, ensuring that the air circulating inside your cabin remains clean and healthy .

Nissan includes a cabin air filter as a standard feature in the 2008 Altima, though it's worth noting that not all Nissan models across all trim levels include this feature. The inclusion often depends on the specific trim level and model year . For Altima owners, this means your vehicle is equipped with this important air quality feature, but it requires regular maintenance to function effectively.

Location of the Cabin Air Filter in the 2008 Nissan Altima

The cabin air filter in your 2008 Nissan Altima is strategically positioned behind the glove box for relatively easy access. This location is consistent across most modern vehicles, including various Altima trim levels . The placement allows for straightforward replacement without requiring complex disassembly of your vehicle's dashboard or HVAC components .

To access the filter, you'll need to empty the glove compartment completely and then squeeze the sides of the glove box to lower it past its stops. This reveals the filter housing, which is typically a rectangular plastic cover secured by clips or tabs . Some models may require you to detach the damper arm on the side of the glove compartment to allow it to drop down fully .

Behind the glove box, you'll find the filter housing where the cabin air filter is contained. The housing is designed to ensure that all air passing into the cabin through the HVAC system goes through the filter, preventing unfiltered air from entering the vehicle . This strategic positioning helps the filter effectively capture contaminants before they reach the interior of your Altima.

When to Replace Your 2008 Nissan Altima's Cabin Air Filter

Nissan generally recommends inspecting and potentially replacing the cabin air filter every 12,000 to 15,000 miles . However, various factors can influence this timeline. Some sources suggest replacement every 20,000 miles or at least once a year, while others recommend more frequent changes depending on driving conditions .

Several signs indicate that your cabin air filter needs replacement. These include reduced airflow from the HVAC vents, unpleasant musty odors when the system is operating, increased fan noise as the blower motor works harder, and excessive window fogging . If you or your passengers notice allergy symptoms worsening while in the vehicle, this could also indicate a clogged filter that's no longer effectively removing allergens from the air .

Your driving environment significantly impacts how often you should replace the filter. If you frequently drive in heavy traffic, dusty conditions, or areas with poor air quality, you should replace the filter more frequently . Similarly, if you have sensitivities to pollen, road dust, or pollution, more frequent changes will help maintain better air quality inside your vehicle .

Step-by-Step Replacement Guide for the 2008 Altima Cabin Air Filter

Replacing the cabin air filter in your 2008 Nissan Altima is a manageable DIY task that requires minimal tools and mechanical experience. Here's a comprehensive step-by-step guide:

​Gather Necessary Tools and Materials: You'll need a new cabin air filter (ensure it's compatible with your 2008 Altima), a Phillips head or flathead screwdriver, and optionally, gloves to keep your hands clean. It's also helpful to have your owner's manual for reference .

​Access the Filter Housing:

1. Open your glove compartment and remove all contents.
2. Look for the stopper arms or dampeners on either side of the glove compartment and carefully detach them.
3. Squeeze the sides of the glove box inward to clear the stops and lower it completely. Some models may require removing a screw or releasing a band that holds the glove box in place .

​Remove the Old Filter:

1. Locate the rectangular filter housing behind where the glove box was positioned.
2. Identify the filter cover, which is typically held in place by clips or tabs. You may need to use a screwdriver to gently release these fasteners.
3. Once the cover is removed, carefully slide out the old filter. Note the direction of airflow indicated by an arrow on the filter, as this will be important when installing the new one .

​Install the New Filter:

1. Before inserting the new filter, take a moment to clean any debris from the filter housing using a vacuum or cloth.
2. Ensure your new filter matches the old one in size and orientation.
3. Insert the new filter into the housing, making sure the airflow arrow points in the correct direction (usually toward the blower motor or the interior of the vehicle) .
4. Reattach the filter cover and secure any clips or tabs.

​Reassemble the Area:

1. Carefully lift the glove box back into position, reattaching any stopper arms or dampeners.
2. Test the glove box to ensure it opens and closes properly .

Throughout this process, avoid forcing any components, as this could lead to damage. If you encounter resistance, double-check that you haven't missed any fasteners or steps .

Choosing the Right Replacement Filter for Your 2008 Altima

When selecting a replacement cabin air filter for your 2008 Nissan Altima, you'll encounter several options. The most common types are standard particulate filters and activated carbon filters. Standard filters effectively trap dust, pollen, and other allergens, while carbon filters provide additional odor reduction capabilities .

Quality varies between brands, with options available from manufacturers like Denso, Fram, and STP, among others. When comparing filters, consider factors such as the filter's MERV (Minimum Efficiency Reporting Value) rating, which indicates its efficiency at capturing particles of different sizes. Higher MERV ratings generally correspond to better filtration .

For the 2008 Altima, specific filter models include the TRQ CFA04607, which is also compatible with 2007-2012 Altima models . Other compatible part numbers include ECOGARD XC45871, Wix 24400, and ACDelco CF3290 . The ATP Cabin Air Filter RA-9 is another option that fits the 2002-2006 Nissan Altima, and may be compatible with certain 2008 models .

When purchasing a replacement filter, always verify compatibility with your specific vehicle model and year. While aftermarket filters can offer cost savings, genuine Nissan parts are designed specifically for your vehicle and may provide optimal performance and fit .

Benefits of Regular Cabin Air Filter Maintenance

Maintaining a clean cabin air filter in your 2008 Nissan Altima offers several important benefits that impact both your driving experience and your vehicle's HVAC system performance.

​Improved Air Quality: A clean filter effectively removes pollutants such as bacteria, road soot, exhaust gases, and pollen particles from the air entering your vehicle's cabin . This is particularly important for individuals with allergies, asthma, or other respiratory conditions, as it significantly reduces their exposure to airborne irritants .

​Enhanced HVAC System Performance: A clean filter allows for optimal airflow to your heating and air conditioning system. This improves the system's ability to heat, cool, and defrost your vehicle, ensuring comfort in all weather conditions . Reduced strain on the blower motor can also lead to quieter operation .

​Increased HVAC System Longevity: When your cabin air filter is clean, your HVAC system doesn't have to work as hard to move air through it. This reduced strain can extend the life of system components, potentially saving you from costly repairs down the road .

​Better Defogging Performance: A clean cabin air filter helps reduce excessive window fogging, which is particularly important for visibility and safety in cold or humid conditions .

Regular filter maintenance represents a small investment that can prevent larger issues while ensuring a healthier and more comfortable environment inside your 2008 Nissan Altima.

Professional Replacement vs. DIY Approach

When it comes time to replace your 2008 Nissan Altima's cabin air filter, you have two main options: professional replacement at a repair shop or DIY replacement. Each approach has its advantages and considerations.

​DIY Replacement:

• Cost-effective, with filters typically priced between 10 and 30
• Requires about 30-40 minutes of your time
• No special tools needed beyond a basic screwdriver
• Provides a sense of accomplishment and deeper understanding of your vehicle

​Professional Replacement:

• Typically costs between 50 and 100, including parts and labor
• Ensures proper installation by experienced technicians
• Saves you time and effort
• May be preferable if you're uncomfortable with DIY projects or short on time

For most 2008 Altima owners, DIY replacement is a practical option given the straightforward process and accessibility of the filter location. However, if you encounter complications during the process or simply prefer professional service, the cost of having a technician perform the replacement is relatively modest compared to more complex automotive repairs.

Troubleshooting Common Cabin Air Filter Issues

Even with proper maintenance, you may encounter issues related to your 2008 Altima's cabin air filter. Here are some common problems and their solutions:

​Persistent Odors: If unpleasant smells continue after filter replacement, consider upgrading to an activated carbon filter, which is specifically designed to absorb odors . You may also need to have your HVAC system cleaned to remove accumulated contaminants from the ductwork .

​Reduced Airflow After Replacement: If airflow seems restricted even with a new filter, double-check that you've installed the correct filter size and type. An incorrect filter that's too dense or doesn't fit properly can restrict airflow. Also verify that you removed any packaging materials from the new filter before installation .

​Noise from HVAC System: Unusual noises after filter replacement could indicate that the filter wasn't seated properly in its housing or that the housing cover isn't fully secured. Reopen the housing and ensure everything is positioned correctly .

​Water Leaks or Moisture: If you notice water in the footwell area after replacement, it's possible that the filter housing or surrounding components weren't properly reassembled, allowing water to enter. Check all seals and connections .

Regular inspection and maintenance of your 2008 Nissan Altima's cabin air filter is a simple yet crucial aspect of vehicle ownership that directly impacts your comfort, health, and HVAC system performance. By understanding the location, replacement process, and maintenance schedule for this component, you can ensure that your Altima continues to provide a clean, comfortable environment for all occupants.