What does it mean when the BMW 5 Series indicates low coolant?

[GageRose]

It means the radiator is low on coolant and needs to be replenished promptly. Coolant is an essential component of a car's engine, consisting of water, antifreeze, and additives. It circulates within the engine's cooling system, carrying away excess heat generated during engine operation to ensure the engine runs at the proper operating temperature. During high temperatures, if the coolant concentration and level are not within the normal range, it can easily lead to engine failure or even overheating. When using antifreeze, please note the following: Try to use the same brand of antifreeze: Different brands may have varying production formulas, and mixing them could cause chemical reactions between additives, rendering them ineffective. Validity period: Most antifreeze products have a validity period of two years (some products may last longer). Ensure the product is within its validity period when adding. Regular replacement is necessary: Typically, replace every two years or every 40,000 kilometers driven, with taxis requiring more frequent changes. When replacing, completely drain the old fluid, clean the cooling system thoroughly, and then add new fluid. Do not dilute with water.