Walker 350-34309 Oxygen Sensor - Center, Downstream Front or Downstream Right

Walker 350-34309 Oxygen Sensor for Nissan and Infiniti

Walker Products 350-34309 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Nissan and INFINITI applications. It is engineered to provide the ECU with the correct exhaust feedback for downstream and center sensor positions on covered vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for the listed vehicle applications
• 4-wire design with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for direct replacement use
• Wiring harness length: 33.78 in.; overall length: 37.32 in.

Product Line Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensor replacement parts for a wide range of vehicles. The 350-34309 follows that application-specific approach, with fitment and connector design matched to the listed Nissan Maxima, Nissan Sentra, and INFINITI I30 positions.

Detailed Description

This Walker oxygen sensor is designed for vehicles that rely on accurate exhaust monitoring to manage fuel delivery and emissions control. It is a direct-fit replacement for select 1998-2001 Nissan Maxima, 1999-2001 INFINITI I30, and 2000-2001 Nissan Sentra applications, including downstream front, downstream right, and center positions as listed. The part number 350-34309 is built for the specified location so the ECU receives the expected diagnostic feedback.

Walker Products has supplied engine management sensors since 1946 and manufactures application-specific replacement parts for modern emissions systems. If a sensor has failed, the vehicle may run poorly, use more fuel, increase exhaust emissions, or trigger the malfunction indicator light. Checking the sensor, wiring harness, and connector for damage is important before replacement.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions on affected Nissan and INFINITI models
• Fault codes stored in the ECU for the monitored sensor circuit

Installation Notes and Tips

Confirm the exact position before ordering, since this part is listed for downstream front, downstream right, and center locations depending on application. Inspect the connector, harness, and surrounding wiring for heat damage or corrosion before installation. Verify thread size and connector style against the original sensor to ensure proper replacement on the vehicle.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company, and this sensor is manufactured as an application-specific replacement for the listed vehicles. This part cross-references Walker Products Aftermarket 350-34309 for the same application.

• Fits 1998 Nissan Maxima, downstream front.
• Fits 1999-2000 Nissan Maxima, downstream front.
• Fits 1999 INFINITI I30, downstream front.
• Fits 2000-2001 INFINITI I30, downstream front.
• Fits 2000-2001 Nissan Sentra, center.
• Fits 2001 Nissan Sentra, downstream right.