What three parts does an air filter consist of?

An air filter is generally composed of an air intake duct, an air filter cover, an air filter housing and a filter element, etc.
The main components of an air filter are the filter element and the casing. Among them, the filter element is the primary filtering part, responsible for filtering the gas. The casing is the external structure that provides necessary protection for the filter element. The working requirements of an air filter are to be capable of performing high-efficiency air filtration without adding excessive resistance to air flow, and to be able to operate continuously for a long time.
Regular maintenance and replacement of filter elements: Most automobile manufacturers require air filters to be dusted after 4,000 to 8,000 kilometers of use. Replace the filter element once after driving 20,000 to 25,000 kilometers. If the air filter element is damaged, it should be replaced in time.
The car engine is the most important power system of a car, and the components inside are also very tight and cannot be damaged in any way. The air filter is a component that protects the engine, so the air filter needs to be replaced or maintained regularly.