Where is the location of BMW 3 series antifreeze? How to replace BMW 3 series antifreeze?

BMW 3 Series antifreeze is located in the engine compartment, as circled in the following figure. Replacement method of BMW 3 series antifreeze: 1. Turn off the engine 10 minute (because the water temperature of the car just turned off is high, it will overflow and cause danger); 2. Press the water tank cover with cloth first, and then gently open the water tank cover; 3. Unscrew the drain valve at the bottom of the water tank (drain the original coolant in the water tank); If the engine has a cylinder oil drain plug, it is necessary to remove the plug and drain the residual coolant in the cylinder; 4. When there is no coolant flowing out, tighten the drain valve and cylinder drain plug; 5. Open a new bottle of antifreeze; 6. Slowly inject new antifreeze into the water tank to the highest mark of the water tank; 7. Put the warm air control button in the heating position, start the engine until the radiator outlet pipe heats up, and then turn off the engine; 8. Check the liquid level of antifreeze (added when the liquid level does not reach the highest mark); 9. Tighten the water tank cover; 10. Cover the machine; When choosing antifreeze, the first thing to pay attention to is whether the selected antifreeze matches the antifreeze of the original car. If it doesn't match, you need to pay attention to thoroughly cleaning the original antifreeze when filling, and you need to clean the liquid storage tank and pipeline. Because antifreeze is a chemical product, different antifreeze may have different chemical components and principles, and chemical reactions may occur when mixed together, causing damage to the automobile cooling system. So be sure to pay attention when using it. Various antifreeze solutions have different freezing points due to different proportions and components, and should be selected according to local temperature conditions. Generally, the freezing point of antifreeze should be lower than the local minimum temperature10 c-15 c to prevent the antifreeze from failing.