At how many kilometers should a sedan undergo its first major maintenance?

[ONova]

Generally, vehicles need to undergo a major maintenance when they reach 30,000 kilometers. The relevant details are as follows: 1. Typically, vehicles should be cleaned every 5,000 kilometers, and the air filter must be replaced every 10,000 kilometers. Major maintenance is based on minor maintenance. 2. Major maintenance requires replacing components such as the engine oil and oil filter, air filter, fuel filter, power steering fluid, and spark plugs. Additional information is as follows: 1. Most sedan engines use a spin-on oil filter, which is a non-cleanable, disposable filter. When changing the lubricating oil, the oil filter must also be replaced; otherwise, it may affect the quality of the lubricating oil. The replacement cycle for engine oil and oil filters is generally also 5,000 kilometers. 2. Currently, most car engines use a dry-type air filter with a paper filter element, which is lightweight, low-cost, easy to replace, and highly efficient. It should generally be cleaned every 5,000 kilometers. During cleaning, the filter element should be taken out and gently tapped on the end face, and compressed air should be blown from the inside out to remove dust from the element. Avoid washing it with gasoline or water. The air filter must be replaced every 25,000 kilometers.