4B0 121 055 F · Coolant hose Audi genuine (OEM) part number 4B0 121 055 F, Coolant hose. Fitted on (2)HOSE — pos (1) · AEB,AJL,AFY, (KAT261.BIN)HOSE — pos (1) (KAT262.BIN) Open the interactive exploded diagram →