Get Audi Car Cabin Air Filters Replacement Cost. Shop Audi Washable Cabin Air Filter & Audi Cabin Air Filters. Locate Best Audi Cabin Air Filters. Maintaining the cabin air filter in your Audi is essential for ensuring a clean and healthy environment inside your vehicle. Signs that it's time to replace your filter include reduced airflow through your Hvac system, persistent unpleasant odors, and an increase in allergy symptoms while driving. To extend the lifespan of your cabin air filter, avoid parking under trees to prevent debris accumulation and run the fan regularly to clear out dust. When selecting a new filter, choose between particulate filters, which trap dust and pollen, and activated carbon filters that also absorb odors and gases. Opt for a high-quality filter to ensure durability and ease of installation, and remember, a fresh cabin air filter is an investment in your comfort and health on the road.