Walker 350-35017 Oxygen Sensor - Upstream

Walker 350-35017 Oxygen Sensor Overview

Walker Products 350-35017 is a heated upstream oxygen sensor built as an OE replacement for specific Hyundai and Kia applications. It is engineered for direct fitment, correct ECU feedback, and reliable air-fuel monitoring on vehicles such as the Hyundai Sonata, Kia Optima, and Kia Sportage.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application coverage. The 350-35017 follows the specified mounting position and connector layout for the listed vehicles, helping maintain proper sensor signal input to the engine control unit.

Key Features

• Heated oxygen sensor for upstream, Bank 1 Sensor 1 applications
• Specific-fit design for listed Hyundai and Kia models
• Threaded mounting type with 18.0 mm thread diameter
• 5-wire configuration with 16.26 in. wiring harness length
• Male connector with radiused polygon shape
• OE replacement design for ECU feedback and emissions monitoring
• Walker Products part number 350-35017

Detailed Description

Walker Products 350-35017 is an upstream oxygen sensor for a wide range of Hyundai and Kia vehicles from 2009 through 2026. It is listed for applications including the Hyundai Sonata, Tucson, Santa Fe, Elantra, Kona, Veloster, and Veloster N, as well as the Kia Forte, Optima, Sportage, Sorento, Soul, Stinger, Seltos, and Forte5. This part number is also listed for select Genesis G70 applications. The sensor is built to match the required fitment position and diagnostic response expected by the ECU.

As an OE-style replacement, this sensor is used where accurate exhaust oxygen feedback is needed for fuel control and emissions monitoring. The heated design helps the sensor reach operating temperature quickly, supporting stable signal output during normal driving conditions. Walker Products 350-35017 is a direct replacement choice for drivers searching for an upstream oxygen sensor for Hyundai Sonata, Kia Optima, or Kia Sportage applications.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing oxygen sensor
• Fault codes stored in the ECU for Bank 1 Sensor 1 or front sensor circuits

Installation Notes and Tips

Confirm the vehicle year, make, model, and emissions configuration before ordering. This part is listed for upstream positions only, including Bank 1 Sensor 1 and front oxygen sensor applications where specified. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect signal quality.

For fitment examples, this part fits 2020-2026 Kia Seltos, upstream; fits 2011-2020 Kia Optima, upstream; and fits 2011-2019 Hyundai Sonata, upstream. It is also listed for 2018-2022 Kia Sportage, upstream and 2017-2020 Hyundai Elantra, upstream.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures sensors to support OE-style replacement needs. The company is ISO 9001/TS 16949 certified, with application-specific part numbering and catalog coverage for modern vehicle platforms. Part number 350-35017 is built for the listed fitments and sensor positions.