Audi RS4/S4 Heater Core Coolant Return Hose / Line 8E1819373T

This OEM Heater Core Coolant Return Hose (Part Number 8E1819373T) is a genuine component sourced from salvage vehicles, ensuring authenticity and reliability. Designed for specific models, this hose is compatible with the 2004-2009 Audi S4 and the 2007-2008 RS4, all featuring the robust 4.2L V8 engine. Positioned as the upper coolant hose, its primary function is to facilitate the return of coolant from the heater core back to the engine, an essential process for maintaining the vehicle’s heating system and overall thermal regulation. Common issues with this component include wear, leaks, or blockages that can impair heating efficiency. Alternative terminologies for this part include Upper Hose and HVAC Heater Hose. Other compatible part numbers include 8E0819378 and N90770201, ensuring a seamless fit for your Audi. Replace your worn-out hose with this factory-original part and restore the comfort of your driving experience.