This OEM Heater Core Coolant Supply Hose, part number 4Z7819371B, is an essential component for optimal heating performance in your Audi Allroad Quattro. Designed with precision to fit models from 2001 to 2005 featuring the 2.7L V6 gas engine, this Genuine Audi part connects directly to the heater core, enabling efficient coolant flow. Over time, hoses can wear out or become damaged, resulting in heating issues, coolant leaks, or engine overheating. Replacing a worn supply hose with this authentic OEM piece ensures reliable operation and maintains system integrity. Also known as the HVAC Heater Hose, it is a vital part for maintaining your vehicle's climate control efficiency. Alternative part numbers include 4Z7121107 and 8D0121428.
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