Some BMW 750Li owners report experiencing engine light activation accompanied by a whistle sound, which could indicate potential issues with the water pump or timing belt. This whistle may signal a failing water pump, crucial for circulating coolant and preventing engine overheating, which, if neglected, can lead to severe engine damage. Additionally, the sound might suggest a problem with the timing belt, essential for synchronizing internal engine components; a failure here could result in serious engine issues or even complete engine failure if not addressed promptly. Owners are advised to consult a qualified mechanic or BMW specialist for diagnosis and necessary repairs, as timely attention to these symptoms is vital for preventing further damage and ensuring the vehicle's performance.
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