7L6 819 523 C · water box Audi genuine (OEM) part number 7L6 819 523 C, water box. Fitted on (3)WATER BOX — pos 18 (KAT493.BIN)WATER BOX — pos 18 (KAT493.BIN)WATER BOX — pos 18 (KAT675.BIN) Open the interactive exploded diagram →