The air filter has a thick black rubber tube on the car engine. One end is connected to the engine, and the other end is connected to the air filter. Most of them are near the engine:
1. It can be replaced according to the replacement cycle indicated in the manufacturer's maintenance manual. Under normal circumstances, the air filter element is recommended to be replaced every 10000-15000 kilometers, because the blockage of the air filter element will affect the air intake of the engine over time, so that the air-fuel ratio in the engine will change, the power of the vehicle will be reduced, and the fuel consumption will increase, etc.;
2. The air conditioner filter can be replaced once a year under normal circumstances. It is frequently used in winter and summer, and replaced every 10,000 kilometers. If the air environment is relatively poor, the replacement mileage can be appropriately shortened and replaced by 7,500 kilometers. The main function of the filter element is to filter bacteria, PM2.5, moisture, pollen and dust in the air, etc.;
3. Therefore, the air filter element should be replaced regularly for the good operation of the vehicle engine; the air conditioning filter element should be replaced in time for the healthy air of the drivers and passengers in the vehicle.

Replacement steps of the air filter:
1. First open the engine compartment cover, stabilize the support rod, and find the position of the air filter;
2. Use a screwdriver to unscrew the screws around the filter cover. Some filter covers are buckled with buckles, then loosen the buckles. Be careful not to let the screws or buckles fall under the engine compartment;
3. After opening the cover, take out the air filter element, and pay attention to the direction in which the filter element is placed when taking it out;
4. Check and clean the filter element. If the surface of the filter element is damaged or too dirty, it is recommended to replace it.