Walker 350-34087 Oxygen Sensor

Walker Oxygen Sensor for Hyundai and Kia

Walker Products 350-34087 is a heated oxygen sensor built as a specific-fit OE replacement for select Hyundai and Kia applications. It is engineered to provide the ECU with the exhaust feedback needed for fuel control and emissions monitoring on vehicles such as the Hyundai Sonata, Hyundai XG300, Hyundai XG350, and Kia Sedona.

Key Features

• Heated oxygen sensor for downstream and upstream applications listed in fitment
• Specific-fit design for correct sensor position and connector match
• 4-wire configuration with male radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 29.84 in; overall length: 33.39 in
• Walker Products Aftermarket engine management sensor line

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE-style replacements for global vehicle coverage. Part number 350-34087 is built for the specified application and fitment position so the ECU receives the correct diagnostic feedback. This matters on vehicles like the Hyundai Sonata and Kia Sedona, where the sensor location must match the original downstream or upstream position for proper operation.

This part cross-references common OE-style oxygen sensor applications for the same vehicle positions. The heated design supports faster sensor response after startup, while the threaded mount and 4-wire layout help maintain the original-style installation format.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine running caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel correction
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the exact position before installation. Fits 2002-2005 Kia Sedona, downstream rear; fits 2002-2005 Kia Sedona, downstream front; fits 2003 Hyundai XG350, downstream front; fits 2002 Hyundai XG350, downstream front; fits 2001 Hyundai XG300, downstream front; fits 1997-1998 Hyundai Sonata, upstream; and fits 1997-1998 Hyundai Sonata, downstream for California-ESV applications. Inspect the sensor, wiring harness, and connector for physical damage before replacement, and confirm the connector style and thread size match the original part.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34087 oxygen sensor is produced for specific vehicle applications and fitment positions to support proper ECU feedback and emissions-system operation.