MicronAir Particle Cabin Air Filter, fits Pontiac Vibe 2002-2008 requires 1 filter, Toyota Tacoma 2005-2013 requires 1 filter and Toyota 4Runner requires 1 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.