MicronAir Carbon Cabin Air Filter, fits BMW: X3 2004-2013 requires 1 filter, M3 2001-2013 requires 1 filter, and 3 Series 1999-2013 requires 1 filter. Offers the same filtration as the particle filter plus the added protection of carbon for odors and smells. Traps Harmful pollutants before they reach your vehicle's interior and provides cleaner air for allergy and asthma sufferers. Vehicle manufacturer recommends filter be changed every 6 to 12 months.
