What do car air filters usually do ?

  Car air filters are designed to prevent harmful debris from getting into areas where it shouldn't and to capture it before it gets in.  The purpose of an air cleaner is to filter the air before it enters the cylinder.  If the car air filter does not work properly, the performance of the car system will degrade. In addition, if a car's filter is left untreated for a long time, it can damage components in a particular system.  

  Cabin air filtershelp prevent dust, pollen, dust and other pollutants from entering the cabin through air conditioning and air vents. If you have allergies or a sensitive respiratory system, an in-car air filter is essential. Regular changes to cycling air filters can create a more comfortable driving environment.  

  How often should car air filters be replaced?  Filter replacement time is no clear answer. Because it depends on a lot of factors, like how many miles the car has traveled, the environment in which it has traveled, and so on. Just like you've used an air purifier at home, you may need to replace the filter in some cases.  So your car's filter needs to be replaced regularly. This will keep the filter working optimally.