420 819 375 · Coolant hose Audi genuine (OEM) part number 420 819 375, Coolant hose. Fitted on (3)HOSE — pos 9 (KAT618.BIN)HOSE — pos 7 (KAT641.BIN)HOSE — pos 9 (KAT752.BIN) Open the interactive exploded diagram →