What are the major maintenance items at 120,000 kilometers?

[StCalvin]

The major maintenance items at 120,000 kilometers include changing the engine oil and transmission fluid, replacing the coolant, checking the brake pads, and performing a deep maintenance of the lubrication system. After reaching the time or mileage specified by the manufacturer, a major maintenance is usually performed every 20,000 kilometers. Detailed introduction of maintenance items: Changing the engine oil. Changing the engine oil is a routine item for both minor and major maintenance, and the 120,000-kilometer maintenance is no exception. Engine oils include mineral oil, semi-synthetic oil, and fully synthetic oil, with quality increasing progressively. Semi-synthetic oil can meet the maintenance interval of 5,000-7,000 kilometers. If the number of maintenance sessions within a year is low, fully synthetic oil can be chosen for better quality. Changing the transmission fluid. In the 120,000-kilometer maintenance, changing the transmission fluid is an important item. The transmission is the link between the clutch and the drive shaft, with very precise internal gears. Frequent gear shifting can easily cause the transmission fluid to deteriorate, which then fails to provide cooling and lubrication, making the transmission prone to damage. Therefore, it is recommended to change the transmission fluid according to the maintenance manual. Changing the coolant. The replacement interval for automotive coolant is generally 2 years, which aligns well with the 120,000-kilometer major maintenance cycle. Coolants usually come in two colors: pink and blue. It is recommended to change the coolant according to the vehicle's maintenance manual. Checking the brake pads. Brake pads should be replaced when they are worn down to one-third of their original thickness. Brake pads should be checked regularly, with front brake pads checked at 30,000 kilometers and rear brake pads checked at around 60,000 kilometers. If they wear out quickly, they should be replaced promptly. Deep maintenance of the lubrication system. The main function of the lubrication system is to effectively lubricate various components of the car engine, clean the sludge and other deposits inside the engine, prevent the oxidation and thickening of the oil at high temperatures, reduce wear on engine components, extend the engine's lifespan, and improve engine power. Other routine inspection items: Check the fluid levels of the brake and clutch. Check whether the fluid level in the power steering reservoir meets the specifications. Check for any oil leaks at the interfaces of the system's oil pipes. Check the fluid levels of the battery and the windshield washer reservoir. Check the tension and aging of the belts for the generator, air conditioner, water pump, and power steering pump. Check whether the front and rear lights of the car are complete (including headlights, width lights, turn signals, brake lights, reverse lights, and fog lights).