It is recommended to replace the air filter and air-conditioning filter once every 10,000 kilometers:
1. The main function of the air filter is to filter the impurities in the air and provide clean gas for the engine to do work. In this process, the impurities in the air are adsorbed on the air filter surface;
2. After reaching a certain mileage, it will appear as shown in the black figure above. At this time, the filtering effect is already very poor and must be replaced in time. In addition, when you find that the car is weak, the engine sound is dull, and the fuel is consuming, you should replace the air filter in time;
3. If a dirty air filter is used in the car, the engine air intake will be insufficient and the fuel will burn incompletely, resulting in unstable engine operation, decreased power, and increased fuel consumption. Therefore, the car must keep the air filter clean.

The difference between car air conditioner filter and air filter is:
1. The air conditioning filter is to filter the impurities, tiny particles, pollen, bacteria, industrial waste gas and dust contained in the air entering the cabin from the outside;
2. Improve the cleanliness of the air, prevent such substances from entering the air-conditioning system to damage the air-conditioning system, provide a good air environment for the occupants in the car, and prevent glass from fogging;
3. The function of the air filter element is to filter the particulate impurities in the air, to ensure that sufficient clean air enters the cylinder, to prevent the dust suspended in the air from being sucked into the engine, and to accelerate the wear of the piston group and the cylinder.