What are the maintenance items for a car at 20,000 kilometers?

[Cory]

20,000-kilometer maintenance is usually the third maintenance for a car and is generally considered a major service. The routine items for the third car maintenance include replacing the engine oil, oil filter, air filter, cabin air filter, spark plugs, etc. Some brand manufacturers may add additional maintenance items. Here are some extended details: Specific introduction: Among these, replacing the engine oil and oil filter are essential items. Due to the harsh high-temperature and high-pressure environment inside the engine, the shelf life of the engine oil is significantly shortened, and its performance greatly deteriorates. Over time, it can no longer protect the engine effectively. The oil filter is replaced to prevent impurities from mixing with the oil, causing oxidation and the formation of sludge that can clog the oil passages. The engine oil and oil filter are always replaced simultaneously.