MicronAir Particle Cabin Air Filter, fits Honda Accord 1998-2002 requires 2, Acura TL 1999-2003 requires 2, CL 2001-2003 requires 2. This filter 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.