Driving conditions and climate can affectthe life of an airfilter. If you drive frequently on dirt roads, stop too much and start driving or live in a dusty and dry climate, you may need tochange your airfilter more often. To track when to replace the airfilter, many peoplerely on a visualin spection to determine when to replace it.
As a result, if your engine doesn't get the require damount of fresh air, it won't work properly. Reducing the air flow can result in engine aspirations, roughidling and dirty spark plugs that can cause starter problems