03C 103 558 M · Vent hose Audi genuine (OEM) part number 03C 103 558 M, Vent hose. Fitted on (3)HOSE — pos (21A) (KAT638.BIN)HOSE — pos (21A) (KAT642.BIN)HOSE — pos (21A) (KAT646.BIN) Open the interactive exploded diagram →