Walker 350-34290 Oxygen Sensor

Walker 350-34290 Oxygen Sensor Overview

Walker Products 350-34290 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Nissan and INFINITI applications. It is designed for downstream monitoring, helping the ECU read exhaust oxygen data and maintain proper emissions system feedback.

Use this Walker Products Aftermarket sensor when servicing a downstream front, downstream right, or downstream left position on supported vehicles, including Nissan Maxima, Nissan Pathfinder, Nissan Sentra, INFINITI I35, and INFINITI QX4 applications.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 32.99 in.; overall length: 36.54 in.

Product Details

Walker Products Aftermarket develops engine management and oxygen/air-fuel sensors as direct replacement parts for many global vehicle platforms. Part number 350-34290 is engineered for the correct fitment position and diagnostic feedback expected by the ECU, making it a practical replacement for downstream sensor service on 2001-2004 Nissan and INFINITI models. This part number, 350-34290, is listed for 2002-2004 INFINITI I35, 2001-2003 INFINITI QX4, 2002-2003 Nissan Maxima, 2001-2002 Nissan Pathfinder, and 2001-2002 Nissan Sentra applications.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures to automotive ISO 9001 / TS 16949 standards. This part cross-references no additional part numbers in the provided data.

What It Helps Address

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

Installation Notes

Confirm the exact position before installation: Fits 2002-2004 INFINITI I35, downstream front; Fits 2002-2003 INFINITI QX4, downstream right; Fits 2002-2003 Nissan Maxima, downstream front; Fits 2001-2002 Nissan Pathfinder, downstream right; Fits 2001-2002 Nissan Sentra, downstream left or downstream, depending on emissions package. Inspect the sensor, wiring harness, and connector for physical damage before replacement. Verify thread size, connector shape, and harness routing against the original part.

Quality Assurance

Walker Products Aftermarket manufactures this oxygen sensor as an OE replacement part for the specified applications and builds it under ISO 9001 / TS 16949 quality systems.