Compatible with the 2002-2008 A4/B6 and 2009-2014 1.8T , the 8E1819373R is a perfect match. Serving as a heater water pipe, it connects the heater tank and the coolant pipe, delivering hot water for . Constructed of high- and low-temperature-resistant rubber, it withstands the complex temperature environment of the engine compartment and provides stable performance. It helps maintain the proper operation of the vehicle's system, ensuring comfortable winter and reducing the risk of heater tank failure.