Genuine OEM Audi Coolant Hose, part number 4G1819371AQ. This hose is designed to transport coolant efficiently throughout the engine cooling system, playing a critical role in maintaining optimal engine operating temperatures. It is positioned within the engine bay as part of the complex coolant circulation network. Weighing 0.1216 kg and measuring 0.23m in length, this hose is crafted from durable materials to withstand high temperatures and pressures. Choosing a genuine OEM hose ensures precise fitment, correct routing geometry, and resistance to fluid degradation, preventing leaks and system failures.