4M0 819 370 B · Coolant hose Audi genuine (OEM) part number 4M0 819 370 B, Coolant hose. Fitted on (3)HOSE — pos 16 (KAT859.BIN)HOSE — pos 16 (KAT859.BIN)HOSE — pos 16 (KAT859.BIN) Open the interactive exploded diagram →