Walker 350-34375 Oxygen Sensor - Downstream Rear or Upstream Left

Walker 350-34375 Oxygen Sensor Overview

Walker Products 350-34375 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 diagnostic feedback needed for proper fuel control and emissions monitoring.

For drivers searching for a downstream rear oxygen sensor for a 2015-2018 Kia Sedona or a 2015-2017 Hyundai Azera, this Walker Products Aftermarket sensor is matched to the listed position and connector style for direct application coverage.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• 28.07 in. wiring harness length and 31.61 in. overall length
• Radiused polygon male connector for application-specific fitment
• OE-style replacement for downstream rear and upstream left positions

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for original-equipment replacement needs. Part number 350-34375 is built for specific fitment positions and is intended to deliver the feedback the ECU uses to monitor air-fuel ratio and emissions performance. This sensor is listed for 2015-2018 Kia Sedona downstream rear, 2015-2017 Hyundai Azera downstream rear, 2014-2016 Kia Cadenza downstream rear, 2012-2014 Hyundai Azera downstream rear, 2013-2014 Hyundai Genesis Coupe upstream left, and 2014 Kia Sedona downstream rear applications.

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

Common Symptoms Addressed

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

Installation Notes

Confirm the sensor position before installation, since this part is listed for both downstream rear and upstream left locations depending on vehicle application. Inspect the sensor, wiring harness, and connector for physical damage before replacement, and verify the connector shape, wire count, and threaded mounting style match the original unit.

For fitment-focused searches, this oxygen sensor is a direct application for a 2015-2018 Kia Sedona downstream rear oxygen sensor and a 2015-2017 Hyundai Azera downstream rear oxygen sensor. It also covers select Kia Cadenza and Hyundai Genesis Coupe listings shown above.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34375 is manufactured for application-specific fitment and ECU feedback requirements.