Walker 350-64083 Oxygen Sensor - Upstream Left or Upstream Right

Walker 350-64083 Oxygen Sensor for Infiniti

Walker Products 350-64083 is a heated oxygen sensor built as a direct OE-style replacement for specific Infiniti applications. It is engineered for the upstream right or upstream left position on select FX50 and QX70 models, with fitment matched to the vehicle’s ECU feedback requirements.

Key Features

• Heated oxygen sensor for precise exhaust feedback
• Specific fit design for confirmed Infiniti applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with female connector
• Radiused polygon connector shape for application-specific connection
• Wiring harness length: 16.26 in; overall length: 19.8 in
• Walker Products Aftermarket part number 350-64083

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for OE replacement use. Part number 350-64083 is built for specific placement on the vehicle, helping the ECU receive the diagnostic feedback expected from the original sensor location. This makes it a practical choice for Infiniti QX70 oxygen sensor replacement and Infiniti FX50 upstream oxygen sensor service when the original sensor has failed or is reporting incorrect data.

Compatible With 2017-2019 Infiniti QX70, upstream right; 2015 Infiniti QX70, upstream right; 2014 Infiniti QX70, upstream right and upstream left; 2013 Infiniti FX50, upstream right and upstream left. Walker 350-64083 is also referenced by the part number 350-64083 for catalog and service lookup.

What It Helps Address

• Check engine light or malfunction indicator light related to oxygen sensor faults
• Poor engine performance caused by inaccurate exhaust oxygen readings
• Increased fuel consumption from incorrect air-fuel feedback
• Higher exhaust emissions from a failing upstream sensor
• Diagnostic trouble codes stored in the ECU for sensor-related faults

Installation Notes and Tips

Confirm the sensor position before installation: this part is listed for upstream right and upstream left applications only, depending on the vehicle and model year. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement, since physical damage can shorten sensor life. Verify the threaded mounting location and connector style match the original unit before installation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The 350-64083 is manufactured as a specific-fit replacement to meet the application and diagnostic needs of the listed Infiniti vehicles.