What is replaced during a car's first maintenance?

[DeFaith]

During a car's first maintenance, the engine oil and oil filter are replaced. Additionally, the coolant level is checked to ensure it meets specifications, and the brake and clutch fluid levels are inspected. The first maintenance must be performed within 5,000 kilometers or six months of driving the car. Generally, it is suitable to perform the first maintenance when the car has been driven between 4,000 and 5,000 kilometers, but the car should not exceed six months of use. The period before the first maintenance is the vehicle's break-in period. During this time, as the engine gradually breaks in, contaminants such as dust, metal wear, and carbon deposits will continuously mix into the engine oil. It is not recommended to drive at high speeds during the break-in period because the oil contains too many impurities, which can lead to abnormal engine wear if high speeds are maintained.