Walker 350-34856 Oxygen Sensor - Downstream

Walker 350-34856 Oxygen Sensor Overview

Walker Products 350-34856 is an OE-style downstream oxygen sensor built for specific Kia and Hyundai applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on the listed vehicles.

Key Features

• Downstream oxygen sensor for emissions system monitoring
• OE replacement fitment for listed Kia Forte, Kia Forte5, and Hyundai Elantra applications
• Built for the specified sensor position and vehicle configuration
• Supports ECU diagnostic feedback on newer vehicles
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensors

Detailed Description

The Walker Products Aftermarket line focuses on engine management sensors that match original equipment application requirements. Part number 350-34856 is a downstream oxygen sensor for select 2017-2024 Kia Forte and Forte5 models, plus the 2020 Hyundai Elantra from 04/15/2019. It is also listed for California emissions-equipped Kia Forte applications with B1S2 downstream fitment. Use 350-34856 when you need a direct replacement oxygen sensor for the specified position and vehicle setup.

This part cross-references no listed interchange numbers in the provided data. For buyers searching by vehicle, this is a downstream oxygen sensor for Kia Forte, Kia Forte5, and Hyundai Elantra applications. The part number 350-34856 is also useful when verifying the exact sensor location before ordering.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal issues
• Stored ECU fault codes for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle year, make, model, emissions package, transmission notes, and sensor position before installation. Inspect the sensor connector, wiring harness, and surrounding exhaust components for damage, since physical wear can shorten sensor life and affect readings. Verify the downstream location matches the application listed for 350-34856.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-34856 oxygen sensor is manufactured as an OE replacement for the listed applications and is intended to provide the diagnostic feedback required by the ECU.