Walker 350-34607 Oxygen Sensor - Downstream Rear or Downstream Right

Walker 350-34607 Oxygen Sensor Overview

Walker Products 350-34607 is a heated oxygen sensor built as a specific-fit OE-style 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, especially on downstream rear and downstream right positions.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment, with this part number matched to the correct mounting position and connector style for the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• 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
• Wiring harness length: 37.13 in.; overall length: 40.67 in.
• Fits downstream rear and downstream right sensor locations

Detailed Product Description

The Walker 350-34607 oxygen sensor is designed for vehicles that rely on accurate exhaust feedback to manage air-fuel ratio and emissions performance. This heated sensor helps the ECU monitor exhaust conditions after the catalytic converter, making it a direct replacement for downstream rear and downstream right positions on select Infiniti I30, Infiniti QX4, Nissan Maxima, and Nissan Pathfinder models. If you are searching for a downstream rear oxygen sensor for a 2000-2001 Infiniti I30 or a downstream right oxygen sensor for a 2001 Infiniti QX4, this part number is built for those exact applications.

As part of the Walker Products Aftermarket line, the 350-34607 is manufactured for specific fitment and diagnostic feedback requirements. The sensor, connector, and wiring should be inspected if the original unit has failed, since damage in those areas can affect sensor life and system performance. This part cross-references Bosch 15717 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light related to downstream 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 oxygen sensor
• Fault codes stored in the ECU for affected sensor circuits

Installation Notes and Fitment

• Fits 2000-2001 Infiniti I30, downstream rear
• Fits 2001 Infiniti QX4, downstream right, to 9/2001
• Fits 2001 Nissan Maxima, downstream rear
• Fits 2001 Nissan Pathfinder, downstream right, to 08/2000
• Fits 1999-2000 Nissan Maxima, downstream rear, Calif-ESV
• Fits 1999 Infiniti I30, downstream rear, Calif-ESV
• Fits 1998 Nissan Maxima, downstream rear, California-ESV

Confirm the sensor position before installation, since downstream rear and downstream right applications are not interchangeable. Inspect the harness and connector for damage before replacing the sensor, and verify the threaded mounting point matches the 18.0 mm specification.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34607 is built to support the diagnostic feedback expected by the ECU in the listed Infiniti and Nissan applications.