Pollen filters are a relatively new invention for use in vehicles and while they have no effect on your car's health, they could have on yours. They usually last a few years and there's no easy way to tell if they're in need of changing but are often overlooked as a serviceable item. We recommend as a general rule that they be serviced at least once a year or after every 15,000 km. As the vehicle's fan blows up to 100,000 litres of air into the cabin in one hour of driving, it is essential to maintain the system with regular checks of the filter. Misty windows, a stuffy cabin and a malfunctioning air conditioning system are sure signs that a replacement is necessary. Check out our
guide for more information.