While a coolant warning light doesn't always require immediate towing, stopping and inspecting the engine is crucial. When the coolant warning light illuminates, first safely pull over to the side of the road and allow the engine to cool down sufficiently. Then, open the hood and check if the coolant level in the reservoir is below the "MIN" mark. If the level is simply low, add the same type of coolant (distilled water can be used temporarily in an emergency). If a minor leak is found, it can be temporarily sealed with a special sealant before taking the engine for repair as soon as possible. However, if a large amount of coolant is leaking, water is mixed with the engine oil, or the cause of the problem cannot be determined, contact a tow truck immediately to avoid driving and potentially causing engine overheating and damage.

Coolant is the core medium for engine cooling; its deficiency or leakage directly affects heat dissipation efficiency. Continuing to drive blindly could lead to serious consequences such as cylinder block deformation and major engine overhauls. Therefore, choosing to tow or emergency handling based on the actual situation is a rational approach that balances safety and cost.

The function of coolant is to remove the heat generated by the engine through circulation, maintaining its normal operating temperature. Although the cooling system structures of different car models vary, common leak points share certain characteristics. Taking BMW models as an example, the radiator, water hoses, water pump, and thermostat are prone to leaks in the cooling system. Replacing only the plastic connector of the radiator during repair may lead to re-leakage due to material aging or poor sealing. Replacing the entire radiator assembly will more thoroughly solve the problem and reduce the probability of repeated repairs.

In actual troubleshooting, attention to detail is crucial. If the coolant level is sufficient but the warning light remains on, further investigation is needed on the radiator, upper and lower water hose connections, water pump, and water hose connections for leaks. Also, check the oil dipstick; if water is mixed in the oil, it indicates a possible connection problem between the cooling and lubrication systems. In this case, stop immediately and contact a tow truck to prevent further damage to internal engine components due to poor lubrication or high temperatures.

Furthermore, if coolant splashes from the filler neck, the radiator cap seal may be faulty. Replace the radiator cap with the same model to restore system pressure balance. It is particularly important to note that you should never open the hood when the engine is still hot after the coolant warning light comes on, as the hot steam may cause burns. If the leak is minor, temporary treatment with sealant should be used, but overloading the vehicle should be avoided. During driving, the coolant temperature gauge and warning light should be continuously monitored, and the vehicle should be stopped immediately if any abnormality is detected.

For problems such as thermostat malfunctions that are difficult to diagnose yourself, it is recommended to contact a professional repair shop for inspection to ensure accurate diagnosis and repair. In short, when the coolant warning light comes on, flexibly handle the situation according to the actual circumstances. Do not ignore the risks and continue driving, nor should you blindly call a tow truck. By using scientific inspection procedures to determine the type of fault, minor problems can be addressed with emergency treatment followed by repair, while serious leaks or complex faults require timely professional assistance to ensure driving safety and avoid unnecessary costs.