4K0 907 807 Q · NOx sensor Audi genuine (OEM) part number 4K0 907 807 Q, NOx sensor. Fitted on (2)SENSOR — pos (5) · PR:T2P,T2S (KAT430.BIN)SENSOR — pos (5) · PR:T2P,T2S (KAT435.BIN) Open the interactive exploded diagram →