Walker 350-34032 Oxygen Sensor - Downstream Left

Walker 350-34032 Oxygen Sensor Overview

Walker Products 350-34032 is a heated oxygen sensor built as a specific-fit replacement for select Nissan applications. It is engineered for the downstream left position and provides the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Compatible With 2004 Nissan Frontier and 2004 Nissan Xterra, this Walker Products Aftermarket sensor is a direct-fit option for the downstream left location. The 350-34032 is designed around the listed application details, including connector style, thread size, and harness length.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the downstream left position
• 4-wire configuration with female connector
• 18.0 mm thread diameter and threaded mounting type
• 41.85 in. wiring harness length and 45.39 in. overall length
• Radiused polygon connector shape for application-specific fitment

Application Details

Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensors for exact application coverage. Part number 350-34032 is built for the 2004 Nissan Frontier, downstream left, and the 2004 Nissan Xterra, downstream left. This sensor is intended to restore accurate exhaust-gas feedback to the ECU so the vehicle can manage air-fuel strategy and emissions diagnostics correctly.

This part cross-references no listed interchange numbers in the provided data.

Common Issues This Sensor May Address

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

Installation Notes and Tips

Before installation, inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion. Confirm the downstream left location, thread diameter, and connector style match the vehicle before removal of the old sensor. Because oxygen sensor faults can also be caused by damaged wiring or connector issues, verify the full circuit during diagnosis.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures sensors to application-specific requirements. The company is ISO 9001/TS 16949 certified, supporting consistent production standards for replacement oxygen sensors like the 350-34032.