As the saying goes, "three points and seven points of maintenance" is very important to maintain the car. To maintain the car, you should pay attention to the following six systems for special maintenance: First, deepening maintenance of the lubrication system The main function of the lubrication system is to effectively lubricate various parts of the automobile engine to prevent excessive wear. Under normal circumstances, the car needs to be cleaned and maintained once every 5000km-10000km, and it needs to be cleaned and maintained once when it encounters excessive engine noise, weak acceleration and high water temperature. Clean the sludge and other deposits inside the engine, avoid the oxidation and thickening of the engine oil at high temperature, reduce the wear of engine components, extend the life of the engine, and improve the engine power. Cleaning and maintenance of the fuel system (i.e. cleaning nozzles and valve carbon deposits) Under normal circumstances, the car needs to be cleaned and maintained once every 10,000km to 15000km, or when you notice that the engine is wheezing, lagging and accelerating badly, and it is smoky, weak, and oily. Clear the glue and carbon deposits in the system, prevent harmful corrosion, avoid and stop the leakage of seals and water tanks, and replace the old coolant completely. 3. Cleaning and maintenance of the cooling system Generally, the car should be cleaned and maintained once in the winter and summer, and once every 6 to 8 months during normal driving, or it should be cleaned and maintained once the water temperature is too high, water leaks or the boiler is opened. Remove traces and scale that cause the engine to overheat, prevent harmful corrosion, avoid and prevent leakage of seals and water tanks, and replace the old coolant completely. Fourth, the cleaning and maintenance of the gearbox (automatic gearbox) Under normal circumstances, the car should be cleaned and maintained once every 20,000km-25000km, or it should be cleaned and maintained once the gearbox slips, the water temperature is too high, gear shifting is slow, and the system leaks. Remove harmful sludge and paint film deposits, restore the elasticity of seals and O-rings, make the gearbox shift smoothly, improve power output, and completely replace the old automatic transmission oil . V. Cleaning and maintenance of the power steering system The vehicle needs to be cleaned every 40,000km-45000km after driving, or if the system leaks due to difficulty in steering, it must also be cleaned and maintained once the power steering gear parts are replaced. Remove harmful sludge and paint film in the system, remove steering difficulties at low temperatures, stop and prevent the leakage of power steering fluid, remove steering noise, and completely replace the old brake steering fluid. 6. Cleaning and Maintenance of the Brake System The vehicle is cleaned and maintained every 50,000km after driving, or it may react too early in case of ABS , and once when it is too slow. Remove the harmful sludge paint film in the system, remove the danger of working failure at ultra-high or ultra-low temperature, effectively prevent the brake fluid from deteriorating and expire, and replace the old brake fluid completely.