Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture BOSCH "0 258 006 913" - Not availableSAAB - 9-3, 9-5, 9-3x; VOLVO - C70, S60; PORSCHE - 911; FORD - Focus, Mondeo