Keep the interior of your B8 A4, allroad, A5, Q5, RS5, S4, S5, SQ5 smelling fresh and clean with a brand new cabin filter from K&N. The K&N Cabin Air FilterVF3009 is a washable replacement cabin air filters are designed to filter your incoming air using state-of-the-art filtration technology - protecting your vehicle’s occupants, interior, and HVAC system from pollutants and unpleasant odors. Engineered to be washable, reusable, and durable, this cabin filter is designed to last for the entire lifespan of your vehicle.