
For a four-year-old car, should include replacing the engine oil and oil filter, fuel filter, air filter, and cabin air filter. Engine Oil and Oil Filter: Inspect the lubrication system maintenance to prevent excessive wear of components due to oil deterioration, insufficient oil, or impurities. The oil filter should be replaced together with the engine oil. Fuel Filter: Maintain the fuel supply system to prevent excessive impurities from clogging the fuel lines, which could lead to insufficient engine power or stalling. Air Filter: Maintain the intake system to prevent dust and impurities from entering the cylinders, which could cause wear on the compression system components. The air filter can be cleaned regularly. Cabin Air Filter: Inspect the cabin air filter to prevent excessive dust accumulation. If dust enters the evaporator, it may result in insufficient cooling or failure of the air conditioning system. Dust on the filter that is not cleaned for a long time can produce odors, polluting the air inside the car.


