During the hot summer months, contaminants such as pollen, dust, mould spores and smog can easily enter a vehicle's passenger compartment through the air conditioning, heating and ventilation systems. This can make the air in the car up to six times dirtier than the air outside.
Cabin air filters clean the incoming air and remove allergens. You can protect yourself and your passengers from contaminants by replacing the vehicle's cabin air filter annually or whenever heating or cooling efficiency is reduced. In areas with heavy contaminants it may require changing more often. If your vehicle’s model is from 2000 or newer, there's a good chance it is equipped with a cabin air filter. Check your owner's manual for more information.