Walker 350-34297 Oxygen Sensor - Downstream Rear

Walker 350-34297 Oxygen Sensor for Hyundai and Kia

Walker Products 350-34297 is a heated oxygen sensor built as an OE-style replacement for specific Hyundai and Kia applications. It is designed for downstream rear or downstream right placement, with fitment matched to the vehicle’s ECU feedback requirements.

Key Features

• Heated oxygen sensor for precise exhaust feedback
• Specific fit application for correct sensor placement
• 4-wire design with 20-gauge wiring
• Radiused polygon male connector for direct connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 22.76 in.; overall length: 26.3 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for OE replacement use. Part number 350-34297 is built for vehicles that require a heated downstream oxygen sensor, including 2001-2002 Hyundai Santa Fe, 1999-2002 Hyundai Sonata, 2001-2002 Kia Magentis, 2001-2002 Kia Optima, and 2003 Kia Optima and Magentis applications listed below. For buyers searching for a downstream rear oxygen sensor for Hyundai Sonata, a rear oxygen sensor for Kia Optima, or a downstream right oxygen sensor for Kia Magentis, this part number is matched to the specified positions and notes.

This part cross-references no listed alternate part numbers in the provided data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from a failing heated O2 sensor
• Higher exhaust emissions from inaccurate air-fuel monitoring
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Confirm the vehicle position before installation: downstream rear or downstream right, depending on application.
• Inspect the sensor wiring harness and connector for damage before replacement.
• Verify the threaded mounting location and connector shape match the original sensor.
• Use the application notes for timing details such as 2003 Kia Optima to 01/06/2003 or 2002 Hyundai Sonata to 8/16/02.
• For rear downstream oxygen sensor replacement on Hyundai Santa Fe and Kia Optima, install in the correct position to maintain proper ECU feedback.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. Part number 350-34297 is manufactured for specific vehicle applications to support the diagnostic feedback expected by the ECU.

Compatible Vehicles

• Fits 2003 Kia Magentis, downstream right.
• Fits 2003 Kia Optima, downstream rear.
• Fits 2001-2002 Hyundai Santa Fe, downstream rear.
• Fits 2002 Hyundai Sonata, downstream rear.
• Fits 2001-2002 Kia Magentis, downstream right.
• Fits 2001-2002 Kia Optima, downstream rear.
• Fits 1999-2001 Hyundai Sonata, downstream rear.