4G0 819 373 AA · Coolant hose Audi genuine (OEM) part number 4G0 819 373 AA, Coolant hose. Fitted on (3)HOSE — pos 21 (KAT738.BIN)HOSE — pos 21 (KAT788.BIN)HOSE — pos 21 (KAT798.BIN) Open the interactive exploded diagram →