Walker 350-34682 Oxygen Sensor - Downstream Rear or Upstream

Walker Oxygen Sensor for Hyundai and Kia

Walker Products 350-34682 is a heated oxygen sensor built as a specific-fit OE replacement for select Hyundai and Kia applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. Part number 350-34682 is matched to the mounting position, connector style, and thread specification required for the listed vehicles, including upstream and rear downstream locations.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 4-wire configuration with 20-gauge wiring
• 13.31 in. wiring harness length and 16.85 in. overall length
• 18.0 mm thread diameter with threaded mounting type
• Radiused polygon connector shape with male connector gender
• OE-style replacement for ECU feedback and emissions monitoring

Detailed Description

The Walker 350-34682 oxygen sensor is designed for vehicles that rely on accurate exhaust oxygen readings to manage air-fuel ratio and emissions systems. It is a heated sensor, which helps it reach operating temperature more quickly for stable signal output after startup. This makes it a practical replacement when diagnosing a check engine light, poor fuel economy, or elevated exhaust emissions on a Hyundai Santa Fe, Hyundai Sonata, Hyundai XG300, Kia Magentis, or Kia Optima.

Walker Products has developed this sensor as an OE replacement for the specified fitments, with application-specific connector and harness details to match the vehicle’s original setup. For shoppers searching for a 2001-2006 Kia Optima upstream oxygen sensor, a 2002-2005 Hyundai Sonata upstream oxygen sensor, or a 2001 Hyundai XG300 rear downstream oxygen sensor, part number 350-34682 is the listed match.

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

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing sensor
• Fault codes stored in the ECU for sensor-related issues

Installation Notes and Tips

• Verify the required position before ordering: this listing includes upstream and downstream rear applications.
• Confirm connector shape, wire count, and thread diameter against the original sensor.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Check the vehicle’s fault codes and repair any related wiring or exhaust issues that could shorten sensor life.
• Use the exact application notes for vehicles such as the Hyundai Santa Fe, Hyundai Sonata, and Kia Optima to confirm Bank 1 Sensor 1 or rear sensor placement.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts for specific applications and builds them under Automotive ISO9001/TS 16949 quality systems. Part number 350-34682 is produced to support the diagnostic feedback required by the ECU on the listed Hyundai and Kia vehicles.