4M0 819 374 CM · Coolant hose Audi genuine (OEM) part number 4M0 819 374 CM, Coolant hose. Fitted on (3)HOSE — pos 17 (KAT429.BIN)HOSE — pos 17 (KAT429.BIN)HOSE — pos 17 (KAT859.BIN) Open the interactive exploded diagram →