At how many kilometers should a car undergo a major maintenance?

[LeWilliam]

Generally, a vehicle requires a major maintenance service after reaching 30,000 kilometers. Here is the relevant information: 1. Major maintenance builds upon minor maintenance, adding the replacement of the air filter and fuel filter to the standard oil and oil filter change. These two filters serve to remove dust from the air and impurities from the fuel, respectively. The proper operation of the engine relies on the appropriate use of various maintenance products. Failing to replace the oil and three filters in time once they reach their service limits can adversely affect engine performance. 2. Currently, most car engines utilize a dry-type air filter with a paper filter element, which is lightweight, cost-effective, easy to replace, and highly efficient. It is generally recommended to clean the filter every 5,000 kilometers. During cleaning, the filter element should be removed and gently tapped on its end face, then blown from the inside out with compressed air to remove dust. Avoid washing it with gasoline or water.