4M2 816 311 · air hose Audi genuine (OEM) part number 4M2 816 311, air hose. Fitted on (2)HOSE — pos (9) · PR:9AH,9AU (KAT859.BIN)HOSE — pos (9) · PR:9AH,9AU (KAT859.BIN) Open the interactive exploded diagram →