C70 L5-2.4L Turbo VIN 63 B5244T7 (2003)
Oxygen Sensor: Locations
Oxygen Sensor Location
Bank 1, Sensor 1 (Heated Oxygen Sensor, Front) is located before the catalytic converter.
Bank 1, Sensor 2 (Heated Oxygen Sensor, Rear) is located after the catalytic converter.