Walker 350-34488 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker 350-34488 Oxygen Sensor Overview

Walker Products 350-34488 is a heated oxygen sensor built as a specific-fit OE replacement for select Infiniti and Nissan applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a direct choice for upstream left or upstream right sensor locations where listed.

Walker Products Aftermarket focuses on application-specific engine management sensors, and the 350-34488 follows that approach with the correct connector style, thread size, and harness length for the listed vehicles. For shoppers searching for an upstream oxygen sensor for Infiniti FX45, Infiniti Q45, Infiniti M45, Nissan Pathfinder, Infiniti FX35, Infiniti G35, or Nissan 350Z, this part number is built around those exact fitments.

Key Features

• Heated oxygen sensor for faster operating 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 male connector for application-specific connection
• Overall length: 21.97 in.; wiring harness length: 18.43 in.
• Walker Products Aftermarket part number 350-34488

Detailed Description

Walker Products 350-34488 is an upstream oxygen sensor designed for precise placement on the left or right side depending on the vehicle application. It is used on select 2002-2006 Infiniti and Nissan models, including 2006 Infiniti FX45 and Q45, 2003-2005 Infiniti FX45, 2002-2005 Infiniti Q45, 2003-2004 Infiniti M45, 2003 Infiniti FX35, 2003 Infiniti G35, 2003-2004 Nissan Pathfinder, and 2003 Nissan 350Z. This part number is also referenced as Walker Products 350-34488 in catalog listings for these applications.

Walker Products Aftermarket develops engine management and oxygen/air-fuel sensors as OE-style replacements for global vehicle coverage. The 350-34488 is manufactured for the specified fitment position so the ECU receives the expected diagnostic feedback from the sensor circuit.

What It Helps Address

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

Installation Notes and Tips

Confirm the vehicle’s build date and sensor position before ordering, especially for 2006 Infiniti FX45 and Q45 applications with production cutoffs noted in the fitment data. Inspect the sensor wiring harness and connector for damage before installation, since physical wear can shorten sensor life and affect signal quality. Verify the threaded mounting location and connector orientation match the original part before tightening.

For fitment-specific searches, this part is commonly selected for an upstream left oxygen sensor on Infiniti FX45 and Q45 models, and for upstream right or upstream left positions on select Infiniti G35, Infiniti FX35, Nissan Pathfinder, and Nissan 350Z applications.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement components and manufactured under Automotive ISO9001/TS 16949 certification standards. Since 1946, the brand has supplied engine management and fuel system components for vehicle applications worldwide.