Walker 350-34128 Oxygen Sensor

Walker 350-34128 Oxygen Sensor Overview

Walker Products 350-34128 is a heated oxygen sensor built as an OE-style replacement for specific GM, Isuzu, Honda, Acura, and related applications. It is engineered for the correct fitment position and ECU feedback, helping restore accurate exhaust monitoring on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Isuzu Rodeo.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for application-specific replacement. The 350-34128 follows that approach with a threaded, 4-wire design and a female radiused-polygon connector for direct-fit service on listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for listed upstream and downstream applications
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon shape
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 15.87 in.; wiring harness length: 12.32 in.

Detailed Description

Walker 350-34128 is designed to replace the original oxygen sensor on vehicles that rely on precise exhaust-gas feedback for fuel control and emissions monitoring. When an oxygen sensor ages or fails, the ECU may log fault codes and the vehicle can run rich or lean, use more fuel, increase emissions, or trigger the malfunction indicator light. This part is built for the specified application and position so the ECU receives the correct signal for closed-loop operation.

Fitment includes applications such as Fits 2000-2002 Chevrolet Silverado 1500, upstream right; Fits 1997-2001 Chevrolet Blazer, upstream left; and Fits 1997-2000 Honda Passport, downstream right. It also covers additional upstream and downstream positions across Chevrolet, GMC, Isuzu, Acura, Cadillac, Buick, Oldsmobile, and Pontiac models listed in the fitment data. Part number 350-34128 is also referenced as Walker Products 350-34128 in catalog listings.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough running or drivability issues tied to sensor signal loss
• Elevated exhaust emissions from inaccurate mixture control
• Stored ECU fault codes for upstream or downstream sensor circuits

Installation Notes and Tips

Confirm the exact year, make, model, engine configuration, and sensor position before ordering. This sensor uses a threaded mount and a female connector, so inspect the harness and connector for damage before installation. If the original sensor failed from wiring or connector issues, repair those concerns as well to avoid shortened service life. Verify whether your vehicle requires an upstream, downstream, left, right, or center position sensor, since the fitment list includes multiple locations.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-34128 is produced as an application-specific OE replacement for the listed vehicles and positions.