8J0 121 109 B · Coolant hose Audi genuine (OEM) part number 8J0 121 109 B, Coolant hose. Fitted on (3)HOSE — pos 39 (KAT609.BIN)HOSE — pos 45 (KAT609.BIN)HOSE — pos 45 (KAT609.BIN) Open the interactive exploded diagram →