4M1 816 311 · air hose Audi genuine (OEM) part number 4M1 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 →