Walker 350-34234 Oxygen Sensor - Upstream

Walker 350-34234 Oxygen Sensor Overview

Walker 350-34234 is a heated oxygen sensor built as a specific-fit OE replacement for the application it was engineered for. It is designed to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and fault-code diagnosis on the vehicle it serves.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for a wide range of vehicles, with application-specific fitment and connector design. The 350-34234 part number follows that approach for buyers searching for a direct-fit oxygen sensor replacement.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the intended vehicle application
• 4-wire configuration with 20-gauge wiring
• 42.44 in. wiring harness length
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon connector shape with male and female connector ends
• Overall length: 45.98 in.

Detailed Product Description

The Walker Products 350-34234 oxygen sensor is engineered for emission control systems that rely on precise exhaust feedback to the ECU. As a heated sensor, it helps the system reach operating temperature more quickly, which supports stable closed-loop fuel management once the engine is running. For shoppers comparing oxygen sensor replacement options for a Honda Civic or similar vehicle application, this part number is built around the original fitment position and connector requirements rather than a universal design.

Walker Products Aftermarket positions this sensor as an OE-style replacement for specific vehicles worldwide. That makes the 350-34234 a practical choice when the original sensor has triggered a fault code, caused drivability issues, or no longer provides reliable signal output. If you are sourcing a Walker oxygen sensor for a Honda Civic, verify the connector style, thread size, and harness length against the original unit before installation.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough running or inconsistent air-fuel control
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the sensor circuit

Installation Notes and Tips

Confirm the connector shape, wire count, thread diameter, and harness length before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion, since physical damage can shorten service life and affect signal quality. Use the vehicle’s original sensor location and mounting style as the reference point when replacing the part.

For fitment-based searches, this Walker 350-34234 oxygen sensor is the type of replacement commonly selected when a direct-fit sensor is needed for a Honda Civic application. Always match the original sensor configuration to the vehicle’s ECU requirements before final installation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures sensors under Automotive ISO 9001 / TS 16949 quality systems. The 350-34234 is built as a specific application replacement to support the diagnostic feedback expected by the vehicle’s ECU.