Why does the BMW 525 always indicate a lack of coolant?

[GiannaFitz]

BMW 525 indicating a lack of coolant can be caused by insufficient coolant, a damaged coolant reservoir, or deteriorated vehicle coolant, among other reasons. Insufficient coolant: Check the actual coolant level to see if it is low. If the coolant is insufficient, there may be a leak in the cooling system. For example, there could be a leak in the pipes or radiator, which requires timely inspection by a repair facility to identify the exact leak point. If the leak is not visible to the naked eye, professional pressure testing may be needed. Damaged coolant reservoir: If the coolant level in the reservoir is at the upper limit but the dashboard still prompts to add coolant, this is a common issue in the BMW 525. It is usually due to the float of the coolant level sensor being stuck, and replacing the coolant reservoir can resolve the problem. Deteriorated vehicle coolant: Vehicle coolant can naturally deplete and deteriorate over time, so it is important to regularly top up and replace the coolant. When adding coolant, ensure the vehicle is cold to prevent burns and ensure safety.