5W4 837 440 · Lift rail Volkswagen genuine (OEM) part number 5W4 837 440, Lift rail. Fitted on (3)RAIL — pos (1B) (KAT369.BIN)RAIL — pos (1B) (KAT392.BIN)RAIL — pos (1B) (KAT397.BIN) Open the interactive exploded diagram →