4L0 860 021 Q · roof rail Audi genuine (OEM) part number 4L0 860 021 Q, roof rail. Fitted on (2)ROOF RAIL — pos (1) · 4L0 860 151 B (KAT493.BIN)ROOF RAIL — pos (1) · PR:3S1 (KAT675.BIN) Open the interactive exploded diagram →