Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture NTY "ESL-TY-000" - Not availableTOYOTA - Auris, Corolla, RAV 4 IV (ZS), Yaris, Prius; LEXUS - NX, CT; SUBARU - Trezia