BOSCH C3876WS Activated Charcoal Workshop Cabin Air Filter - Compatible with Select Audi A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, RS4, RS6, S4, S6

Bosch Premium Carbon Activated Cabin Air Filters absorb up to 100% of all pollen, dust particles and harmful substances. This results in a noticeable improvement in the air quality inside the vehicle. Bosch Carbon Activated Cabin Air Filters go one step further than Particulate Filters. Bosch Carbon Activated Cabin Air Filters have a 5-layer design that includes an additional carbon layer that absorbs toxic and foul-smelling gases such as ozone, nitrogen oxide, sulfur dioxide and hydrocarbons, and an additional cover layer for extra protection.