Walker 350-34700 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Walker 350-34700 Oxygen Sensor Overview

Walker Products 350-34700 is a heated oxygen sensor built as an OE-style replacement for specific Nissan and INFINITI applications. It is engineered for the downstream position and provides the ECU with the feedback needed to monitor exhaust performance and emissions control.

For drivers servicing a Nissan Sentra, Rogue Sport, Armada, TITAN, TITAN XD, NV2500, NV3500, Qashqai, X-Trail, or INFINITI QX80, this sensor is matched to the listed vehicle, position, and connector requirements.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for the listed Nissan and INFINITI applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• Radiused polygon connector shape with male connector gender
• Wiring harness length: 13.31 in.; overall length: 16.85 in.
• Walker Products Aftermarket part number 350-34700

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for direct replacement use. Part number 350-34700 is manufactured for the specified application and fitment position so the ECU receives the expected diagnostic feedback. This matters on modern vehicles where a failing downstream oxygen sensor can trigger fault codes, illuminate the MIL, increase fuel consumption, raise exhaust emissions, or contribute to poor engine operation.

This part cross-references common OE-style replacement needs for the same application. Compatible vehicle coverage includes 2013-2022 Nissan Sentra, 2017-2021 Nissan Rogue Sport, and 2017-2019 Nissan TITAN downstream sensor positions, along with listed INFINITI QX80 and other Nissan models. Use the exact year, model, and downstream position shown in the fitment data before ordering Walker 350-34700.

What It May Help Resolve

• Check engine light related to downstream oxygen sensor faults
• Stored ECU fault codes tied to exhaust sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Higher fuel consumption from inaccurate air-fuel monitoring
• Increased exhaust emissions from a worn or damaged sensor

Installation Notes and Tips

Confirm the vehicle’s exact year, model, emissions setup, and downstream position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life. Verify the threaded mounting location and connector orientation match the original sensor before final tightening.

Fitment examples include 2017-2019 Nissan Armada, downstream left or downstream right; 2018-2019 Nissan Sentra, downstream; and 2017-2019 INFINITI QX80, downstream left or downstream right. Walker 350-34700 is also listed for 2018-2021 Nissan NV2500 downstream left and downstream right applications, plus 2020-2021 Nissan NV3500 downstream right.

Quality Assurance

Walker Products has been producing engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34700 oxygen sensor is built to support OE-style fitment and diagnostic performance for the specified Nissan and INFINITI applications.