Walker 350-34348 Oxygen Sensor - Downstream

Walker 350-34348 Oxygen Sensor Overview

Walker 350-34348 is a heated oxygen sensor built as a specific-fit OE replacement for supported applications. It is engineered to deliver the ECU feedback needed for fuel control and emissions monitoring, making it a practical choice for diagnosing or replacing a failing sensor on vehicles such as Honda Civic and similar applications where the correct sensor position matters.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for direct replacement use. The 350-34348 follows that approach with application-specific fitment, a threaded mounting design, and a 4-wire heated configuration for stable signal response.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific-fit design for the intended vehicle application
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 30.63 in.
• Overall length: 34.17 in.

Product Details

Walker Products 350-34348 is designed to replace the original oxygen sensor in applications that require a heated, ECU-referenced sensor. The sensor helps the engine control unit monitor exhaust oxygen content so the system can adjust air-fuel delivery and maintain proper emissions performance. If the sensor signal becomes inaccurate, the vehicle may run poorly, use more fuel, trigger higher exhaust emissions, or illuminate the malfunction indicator light. This part number is built for the specified fitment position and should be matched to the vehicle’s connector, thread size, and harness layout before installation. Walker Products Aftermarket 350-34348 is a direct-fit service part for technicians and DIY repairs where the original sensor has aged or failed.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by incorrect air-fuel feedback
• Increased fuel consumption from a degraded sensor signal
• Elevated exhaust emissions from poor mixture control
• Connector, harness, or sensor replacement after physical damage

Installation Notes and Tips

Verify 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 those issues can shorten service life and affect signal quality. Confirm the sensor location on the vehicle and compare the original part to Walker 350-34348 before threading it into place. For fitment-based searches, this part is commonly referenced for oxygen sensor replacement on Honda Civic applications where the correct heated sensor configuration is required.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an Automotive ISO 9001 / TS 16949 certified company. The Walker Products Aftermarket line is built around OE-style replacement parts for vehicle-specific service needs, including oxygen sensors such as 350-34348.