What needs to be maintained for 25,000 kilometers?

25,000 km maintenance projects include oil change and machine filter, air filter, air conditioner filter, throttle cleaning and tire adjustment; Then check whether the oil is in the standard position, check the fastening degree of the chassis screws and whether the lighting is good and normal; Finally, check whether the tire pressure and brake pads are normal. The main maintenance items of 25,000 kilometers are as follows: 1. Replace the air filter. After driving 30,000 kilometers, the air filter will be covered with a lot of dust and oil, and the performance of the air filter will be greatly affected after driving 30,000 kilometers. Therefore, it is best to replace it to ensure working performance. 2. Throttle cleaning: Whether the acceleration of the car is flexible is closely related to the cleaning of the throttle. During the operation of EFI engine, a small amount of exhaust gas produced by combustion in the cylinder will accumulate on the throttle body through the intake valve and intake pipe. After a long time, the throttle will form dirt, which will increase the opening and closing resistance of the throttle and make the engine idling unstable. Therefore, it is necessary to clean the throttle regularly. 3. Replace the air-conditioning filter element: The air-conditioning filter element contains activated carbon, which can adsorb fine particles. As time goes on and the frequency of use increases, the activated carbon will gradually decrease. Too dirty air conditioning filter will lead to a decline in refrigeration effect and an odor. 4. Replace antifreeze: Generally speaking, antifreeze should be replaced after driving for 20,000 kilometers or 1 year. This can improve the boiling point, prevent scaling and corrosion, improve the heat dissipation effect, make the water pump play a lubricating role, and avoid and eliminate the damage of instantaneous high temperature caused by bubbles to the engine.