How often should the antifreeze in a sedan be replaced?

[JosieRose]

Sedan antifreeze should typically be replaced every two years, or when the vehicle reaches approximately 40,000 kilometers. The functions of automotive antifreeze include: 1. Providing anti-corrosion protection for components of the cooling system; 2. Preventing scale buildup to avoid reducing the radiator's cooling efficiency; 3. Ensuring the engine operates within the normal temperature range. Precautions for using antifreeze include: 1. Regularly checking the antifreeze level and topping it up promptly if it falls below the minimum mark; 2. Observing whether the antifreeze has any turbid sediments and replacing it immediately if such sediments are present; 3. Not mixing antifreeze of different colors, as they vary by vehicle model; 4. Measuring the antifreeze's freezing point before winter to prevent it from freezing.