Walker 350-34273 Oxygen Sensor

Walker 350-34273 Oxygen Sensor Overview

Walker Products 350-34273 is a heated oxygen sensor built as a specific-fit OE replacement for select Nissan and INFINITI applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

For drivers searching for a downstream oxygen sensor for Nissan GT-R, Nissan Altima, or INFINITI QX80 applications, this Walker Products Aftermarket sensor is built around the vehicle’s original mounting position and connector style.

Key Features

• Heated oxygen sensor for emissions and engine management feedback
• Specific-fit design for the listed vehicle applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• Radiused polygon connector shape with male connector
• Wiring harness length: 9.37 in.; overall length: 12.91 in.
• Walker Products Aftermarket part number 350-34273

Product Details

Walker Products develops engine management and oxygen/air-fuel sensors as OE-style replacements for worldwide vehicle coverage. Part number 350-34273 is manufactured for the specified application and fitment position so the ECU receives the correct sensor signal for downstream monitoring. This matters on vehicles such as the Nissan GT-R, Nissan Altima, and INFINITI QX80, where the downstream sensor helps the control system track catalyst efficiency and emissions-related performance.

When an oxygen sensor begins to fail, the vehicle may store fault codes, run poorly, increase fuel consumption, raise exhaust emissions, or illuminate the malfunction indicator light. Checking the sensor, wiring harness, and connector for damage is important because physical wear can shorten service life and affect signal quality.

What This Sensor Helps Address

• Check engine light related to oxygen sensor or emissions monitoring faults
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel control
• Higher exhaust emissions from degraded sensor response
• Fault codes stored in the ECU for downstream sensor circuits

Installation Notes and Fitment

Compatible with select applications including Fits 2024 Nissan GT-R, downstream rear; Fits 2023 Nissan GT-R, downstream right; Fits 2009-2021 Nissan GT-R, downstream right; Fits 2009-2021 Nissan GT-R, downstream left; Fits 2012-2017 Nissan NV2500, downstream right; Fits 2012-2017 Nissan NV2500, downstream left; Fits 2012-2017 Nissan NV3500, downstream right; Fits 2012-2017 Nissan NV3500, downstream left; Fits 2016 INFINITI QX80, downstream right; Fits 2016 INFINITI QX80, downstream left; Fits 2015 INFINITI QX80, downstream right; Fits 2015 INFINITI QX80, downstream left; Fits 2014 INFINITI QX80, downstream right; Fits 2014 INFINITI QX80, downstream left; Fits 2009-2014 Nissan Maxima, downstream front; Fits 2011-2013 INFINITI QX56, downstream right; Fits 2011-2013 INFINITI QX56, downstream left; Fits 2013 Nissan Altima, center; Fits 2007-2010 Nissan Altima, center; Fits 2007-2012 Nissan Altima, downstream; Fits 2012 Nissan Altima, center; Fits 2007-2011 Nissan Altima, center; Fits 2009-2011 Nissan Murano, downstream front; Fits 2011 Nissan Quest, downstream front.

Verify the original sensor location before installation, especially on Nissan Altima California emissions and non-California emissions configurations. Confirm connector shape, thread size, and harness routing match the removed part before installation. Inspect the wiring and connector for heat damage or abrasion before replacing the sensor.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures under Automotive ISO9001/TS 16949 quality systems. Part number 350-34273 is built as a specific application replacement for the listed fitments and is backed by Walker Products’ established OE-replacement manufacturing approach.