2pcs Oxygen Sensor Upstream Downstream for 2001-2004 Chevrolet Venture Impala Monte Carlo Pontiac Montana Aztek 3.4L Accessories

High-concerned chemical：None Type：Heating Type Repeatability：for 2001 2002 2003 2004 Pontiac Aztek 3.4L Hysteresis：for 2001 2002 2003 2004 Chevrolet Impala 3.4L Linear：Oxygen Sensor (Not Air Fuel Ratio Sensor) Measuring Range：Upstream, Downstream, Sensor 1, Sensor 2 Sensitivity：Upstream, Sensor 1, Front, Pre Cat. Sensor Type：Piezoelectric Origin：Mainland China OEM NO.：234-4087, 234-4650 Resolution：for 2001 2002 2003 2004 Buick Century 3.1L

High-concerned chemical: None Type: Heating Type Repeatability: for 2001 2002 2003 2004 Pontiac Aztek 3.4L Hysteresis: for 2001 2002 2003 2004 Chevrolet Impala 3.4L Linear: Oxygen Sensor (Not Air Fuel Ratio Sensor) Sensitivity: Upstream, Sensor 1, Front, Pre Cat. Sensor Type: Piezoelectric Origin: Mainland China OEM NO.: 234-4087, 234-4650 Resolution: for 2001 2002 2003 2004 Buick Century 3.1L