Explore Subaru Outback Washable Cabin Air Filter & Subaru Outback Automotive Cabin Air Filters. Discover Subaru Outback Car Cabin Air Filters Replacement Cost. Maintaining the cabin air filter in your Subaru Outback is crucial for ensuring a clean and healthy cabin environment. A clogged or dirty filter can lead to inefficient Hvac performance and musty odors, signaling the need for replacement. To extend its lifespan, regularly check and vacuum the filter every 15,000 miles. When selecting a new filter, opt for either a particulate or activated carbon filter; the former captures dust and pollen, while the latter also absorbs odors and gases. High-quality, OEM-spec filters ensure the best fit and function. For DIY enthusiasts, installation is straightforward, but ensure the airflow arrows align correctly for optimal efficiency. Shop with us for premium options and breathe easier on every journey.