BMW 430i Gran Coupe cooling system overheating issue requiring costly repairs on BMW 430i Gran Coupe

Some BMW 430i Gran Coupe owners report experiencing cooling system overheating issues that can lead to costly repairs. Common culprits include coolant leaks from components such as the water pump, radiator, or hoses, which can significantly raise the engine temperature. Additionally, malfunctioning radiator fans may cause overheating, particularly during idling. A failed thermostat can also disrupt the cooling system, contributing to the problem. Promptly addressing these overheating issues is crucial to prevent severe engine damage and avoid expensive repairs, including engine replacement. It is recommended that owners consult a qualified mechanic to diagnose and resolve the underlying causes of overheating, as early recognition of symptoms can help mitigate further damage.