The oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.

Walker Products Engine Management and Oxygen/Air-Fuel sensors have been engineered and developed to be an Original Equipment Manufacturers replacement for many vehicles worldwide. Every part number is manufactured for the specific application, fitment position on the vehicle, and will provide the relevant diagnostic system feedback as required by the ECU. Newer vehicles will store fault codes in the ECU, some will relate to the affected sensor and its associated systems. A failed sensor might make itself known by causing the engine to run poorly, increase fuel consumption, exhaust emissions, or illuminating a (MIL) malfunction indicator light. The sensor, wiring harness, and connector should also be checked for physical damage. This will most likely also cause their operational life to be shortened. We are an Automotive ISO9001/TS 16949 certified company, with un-paralleled customer service, marketing, and shipping. Our electronic and paper catalogs are designed for todays fast paced marketplace, along with our eye catching packaging. Since 1946, Walker Products has been the number one choice for the engine management sensors and fuel system components needed for your vehicle. -¬ 2023 Walker Products Inc. All rights reserved.

• Coated in with electrodes made of a gas-permeable platinum layer.
• Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
• Monitors exhaust gases and reduces pollutants for a cleaner environment.
• Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
• Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.

CA_Prop65_Nickel:	WARNING: This product can expose you to chemicals, including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov
Connector Gender:	Male
Connector Shape:	Rectangle
Mounting Type:	Threaded
Overall Length:	460.0
Sensor Type:	Heated
Thread Diameter:	18.0
Thread Size:	M18
Universal Or Specific Fit:	Specific
Wire Gauge Measurement:	20.0
Wire Quantity:	4

• 2002 Hyundai Sonata | Position: Downstream Front | Note: From 8/16/02
• 2002 Hyundai Sonata | Position: Upstream Front | Note: From 8/16/02
• 2003-2006 Hyundai Santa Fe | Position: Downstream Front
• 2003-2009 Hyundai Santa Fe | Position: Upstream Front
• 2003-2005 Hyundai Sonata | Position: Downstream Front
• 2003-2005 Hyundai Sonata | Position: Upstream Front
• 2003-2008 Hyundai Tiburon | Position: Upstream Front
• 2003-2008 Hyundai Tiburon | Position: Upstream Rear
• 2003 Kia Optima | Position: Downstream Front | Note: From 01/06/2003
• 2003 Kia Optima | Position: Upstream Front | Note: From 01/06/2003
• 2004-2006 Kia Optima | Position: Downstream Front
• 2004-2010 Kia Optima | Position: Upstream Front
• 2005-2009 Hyundai Tucson | Position: Downstream Front
• 2005-2010 Kia Sportage | Position: Downstream Rear
• 2005-2010 Kia Sportage | Position: Upstream Rear
• 2007-2010 Kia Rondo | Position: Upstream Front
• 2002 Hyundai Sonata | Position: Upstream Rear | Note: From 8/16/02
• 2003-2009 Hyundai Santa Fe | Position: Upstream Rear
• 2003-2005 Hyundai Sonata | Position: Upstream Rear
• 2003-2008 Hyundai Tiburon | Position: Downstream Front
• 2003 Kia Optima | Position: Upstream Rear | Note: From 01/06/2003
• 2004-2010 Kia Optima | Position: Upstream Rear
• 2005-2009 Hyundai Tucson | Position: Upstream Front
• 2005-2009 Hyundai Tucson | Position: Upstream Rear
• 2005-2010 Kia Sportage | Position: Upstream Front
• 2007-2010 Kia Rondo | Position: Upstream Rear