What are the maintenance items for 40,000 km cars?

If the vehicle travels 40,000 kilometers, it needs routine maintenance. At the same time, it is necessary to clean the accelerator and injector, change the gearbox oil, and do four-wheel balanced transposition and four-wheel positioning. First, routine maintenance. Need to change the oil, machine filter, check the air and air conditioning filter. If the air and air conditioning filter elements are particularly dirty, they need to be replaced. If it is not too dirty, it can be cleaned with a high-pressure air gun. If you change the oil, in general, you should change synthetic engine oil every six months or five thousand kilometers. In synthetic engine oil, it should be replaced once a year or 10,000 kilometers. If the number of kilometers run in half a year is particularly small, it can be maintained once a year according to the actual situation. Second, clean the throttle, nozzle and oil circuit. In the case of 40,000 kilometers, both the throttle and the nozzle need to be cleaned. After cleaning the throttle, it is necessary to match the throttle opening and set the ECM and PCM. After removing the carbon deposit, the vehicle can keep the oil circuit clean, and at the same time, it can achieve the purpose of saving fuel and protecting the environment, so that the speed-up performance of the vehicle is better. Three, four-wheel balanced transposition and four-wheel positioning. When the vehicle runs to 40,000 kilometers, due to the different degree of tire wear, it is necessary to carry out regular transposition and dynamic balance. The purpose of dynamic balance is mainly to prevent tire imbalance and body shaking when driving at high speed. Four-wheel alignment is mainly to keep the vehicle in a straight line during driving, prevent the vehicle from sliding and swinging its tail, and keep the driving stability of the vehicle at the safest coefficient.