Car Air Filters are extremely employed by customers owing to their sturdy nature. These filters prevent any insects, dust, particles, sand or debris reaching the engine and ensures a good mixture of air and fuel to support performance. The purpose of these filters is to prevent dust, dirt and other environmental contaminants from getting into the engine. Car Air Filters might not seem an important component to regularly check and change, but they are essential in maintaining your car's performance. Over time, the air filters become dirty and clogged, and will need to be replaced. How often the engine air filters will need replacement varies.