How many liters of coolant are needed for a BMW X3?
2 Answers
A BMW X3 requires 6 liters of coolant for a complete replacement. Coolant is a special additive-containing liquid primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and providing year-round protection against scale and corrosion. How to replace coolant: Before completely replacing the coolant, conduct a thorough inspection to check for any leaks or cracks in the pipes, with a focus on the five-way hose. The coolant flows through the five-way hose and is then distributed to different parts of the car to function. If there is any leakage of coolant in this area, replace the hose or resecure the connection as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir and continue filling until water flows continuously through the engine cooling system. Then, start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir will have a faint pink color. Continue adding clean water until the outflowing water is clear. Remember to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new coolant through the radiator hose. Then, add another bottle of coolant to the reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. As some air is expelled from the cooling system, the coolant level will drop. Add more coolant until it reaches the "MAXT" mark on the reservoir.
I've been driving a BMW X3 for several years and have changed the coolant several times. This stuff is quite important for engine protection. Generally speaking, the amount is between 5 to 7 liters, with most model years like the 2015 version and later using around 6 liters. Remember to check the owner's manual to confirm the specific type before changing it, otherwise it can get messy when draining the old fluid. My first time doing it, I didn't measure accurately and only used 5 liters, which almost caused problems in winter. I recommend not cutting corners—prepare a large bucket to catch the old fluid, and when adding new coolant, start the engine to circulate and test the fluid level. Regular replacement prevents corrosion and overheating. If you're doing it yourself, it's best to find a video tutorial for reference—safety first.
