4M0 131 551 K · RETAINING Audi genuine (OEM) part number 4M0 131 551 K, RETAINING. Fitted on (3)RETAINING — pos 18 (KAT429.BIN)RETAINING — pos 18 (KAT595.BIN)RETAINING — pos 18 (KAT859.BIN) Open the interactive exploded diagram →