Walker 350-34368 Oxygen Sensor - Upstream

Walker Oxygen Sensor for Hyundai Sonata

Walker Products 350-34368 is a specific-fit heated oxygen sensor engineered for OE-style replacement on select Hyundai Sonata applications. It is built for the upstream position and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

For 1990-1993 Hyundai Sonata models, this Walker Products Aftermarket sensor offers a direct-fit solution for the upstream oxygen sensor location. The 350-34368 part number is built around the application-specific mounting, connector, and harness details required for accurate sensor replacement.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit for the upstream position
• 4-wire design with 22-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• 6.22 in. wiring harness length and 9.76 in. overall length

Detailed Description

Walker Products 350-34368 is part of the Walker Products Aftermarket engine management sensor line, which focuses on OE-style replacement components for vehicle-specific fitment. This oxygen sensor is engineered for the 1990-1993 Hyundai Sonata, upstream, where it helps the ECU monitor exhaust oxygen content and adjust air-fuel delivery. The heated sensor design supports quicker feedback after startup, which is important for drivability and emissions control. If your Hyundai Sonata is showing fuel trim issues, a malfunction indicator light, or poor running conditions tied to oxygen sensor performance, this part number provides a direct replacement path. The 350-34368 is also a practical search match for buyers looking for a 1990 Hyundai Sonata upstream oxygen sensor, a 1991-1993 Hyundai Sonata oxygen sensor replacement, or a Walker 350-34368 OE-style sensor.

Walker Products has long focused on engine management and oxygen/air-fuel sensors for global vehicle applications, with manufacturing centered on application-specific fitment and ECU feedback requirements. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor
• Damaged sensor wiring or connector issues at the sensor location

Installation Notes and Tips

Install this sensor in the upstream oxygen sensor position only for the listed Hyundai Sonata applications. Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since those conditions can shorten sensor life and affect signal quality. Confirm the threaded mounting and connector style match the original part before installation.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement components for specific applications and fitment positions. The brand operates as an Automotive ISO9001/TS 16949 certified company, supporting consistent production and application control for parts such as the 350-34368 oxygen sensor.