Position: Downstream. Notes: Oxygen Sensor -- Bank-1 Sensor-2; Downstream. 2006 Mazda 6 i 2.3L 4 Cyl FI Naturally Aspirated GAS Manual. 2007-2008 Mazda 6 2.3L 4 Cyl FI Naturally Aspirated GAS Manual. 2006 Mazda 6 i 2.3L 4 Cyl FI Naturally Aspirated GAS Automatic.
