Walker 350-34198 Oxygen Sensor

Walker 350-34198 Oxygen Sensor for Nissan and Infiniti

Walker Products 350-34198 is a heated oxygen sensor built as an OE-style replacement for specific Nissan and Infiniti applications. It is engineered for the correct fitment position and ECU feedback on downstream and upstream locations where listed, helping maintain accurate exhaust monitoring on vehicles such as the Nissan Armada, Nissan TITAN, Nissan Pathfinder, Nissan Sentra, and INFINITI QX56.

Key Features

• Heated oxygen sensor with 4-wire design
• Specific-fit application for listed Nissan and Infiniti vehicles
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper harness connection
• 16.06 in. wiring harness length and 19.61 in. overall length
• OE-style replacement from Walker Products Aftermarket

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as original-equipment replacement parts for a wide range of vehicles. Part number 350-34198 is built for specific vehicle, position, and diagnostic requirements, making it a direct-fit oxygen sensor for selected downstream and upstream locations. This part number is used across 2002-2015 applications and appears in fitments for Nissan Armada, Nissan TITAN, Nissan Pathfinder, Nissan Sentra, Nissan Pathfinder Armada, and INFINITI QX56. If you are searching for a Walker 350-34198 oxygen sensor for a Nissan Armada downstream right or Nissan TITAN downstream left application, this listing matches the documented fitment data.

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

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to sensor signal issues
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for affected sensor circuits

Installation Notes

• Verify the exact year, make, model, and sensor position before ordering.
• Confirm whether the vehicle uses downstream right, downstream left, downstream, or upstream placement.
• Inspect the sensor connector, wiring harness, and surrounding wiring for damage before installation.
• Check for exhaust leaks or related engine management faults that can affect sensor readings.
• Use the listed threaded mounting and connector style to confirm physical fitment.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. Part number 350-34198 is manufactured for the specified application and position to provide the diagnostic feedback required by the ECU.