Cabin Air Filter CUK - Breathe Freely - Why are pollen filters important? The air that flows into the cabin through the air conditioning system while the car is in motion contains about five times more exhaust fumes, pollutants and allergens than roadside air. Cabin air filters ensure that the driver and passengers in the vehicle breathe in as little polluted air as possible. To best protect against these dangers, your cabin air filter (also known as the pollen filter) needs to be replaced regularly . MANN-FILTER pollen filter with activated carbon - additional protection against particles, harmful gases and odours in the vehicle interior MANN-FILTER combination filters prevent almost 100% of the smallest particles from entering the vehicle interior. Pollen , soot , tyre wear dust and even particulate matter cannot enter the vehicle through the air vents. An additional high-quality layer of activated carbon protects passengers from harmful gases such as ozone , sulphur and nitrogen oxides , as well as unpleasant odours . This is a suitable filter for people who suffer from hay fever or asthma or who drive frequently. Cabin air filter CUK - Breathe Freely - When does the pollen filter have to be replaced? During its service life, the cabin air filter continuously absorbs dust particles. As the pollution increases, its efficiency decreases and it can no longer perform its filtering function (see figure). To ensure clean air in the cabin and prevent invisible dangers while driving, the cabin air filter must be replaced at least every 15,000 kilometers or once a year.