You are familiar with air filters and oil filter, but are familiar with cabin air filters? Your Audi S4 vehicle is equipped with cabin air filter. This Audi cabin air filter is also referred to as dust filter, pollen filter and passenger compartment filter. Cabin air filters are be located under the dashboard, in the engine compartment or behind the glove box. Your 2001 Audi cabin air filter functions in keeping contaminants from getting inside the passenger cabin and significantly improves the quality of air that enters the passenger cabin. Because unclean air can be a great health risk to people, cabin air filters are of great benefit to you and your passengers. Mann cabin air filter is one of the trusted air filters of vehicle enthusiasts. Mann air filters are made from specially impregnated filter paper that is designed to offer long service life. Its tough and durable structure is made to withstand harsh working conditions to ensure quality and performance that lasts longer. With vehicle specific designs, they cover all popular year, make, and model of vehicle’s accessory needs in enhancing the performance of your reliable Audi ride. Your Audi S4 cabin air filter should, however, be replaces every 12,000 to 15, 000 miles or at least once a year. If you drive frequently in a dusty road, you need to take proper care of your cabin air filter. If it needs to be replaces, do it as soon as possible. Mann 2001 Audi cabin air filter is available here in our site. Simply browse through our online catalog to find the air filter that you need.