420 121 101 D · Coolant hose Audi genuine (OEM) part number 420 121 101 D, Coolant hose. Fitted on (3)HOSE — pos (1) (KAT618.BIN)HOSE — pos 1 (KAT752.BIN)HOSE — pos 1 (KAT752.BIN) Open the interactive exploded diagram →