Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture NTK "95030" - Not availableDAEWOO - Lanos, Matiz, Leganza, Rezzo, Kalos; OPEL - Astra G, Vectra B; PEUGEOT - 306, 206