Walker 350-31018 Oxygen Sensor - Downstream or Upstream

Walker 350-31018 Oxygen Sensor Overview

Walker Products 350-31018 is a specific-fit oxygen sensor for select Nissan and Jaguar applications. It is built as an OE-style replacement for upstream and downstream positions where listed, with the correct connector, thread size, and wiring layout for the application.

For Nissan 240SX, Altima, Sentra, Pickup, D21, and related models, this oxygen sensor helps restore ECU feedback when the original sensor is worn or damaged. The Walker Products Aftermarket line focuses on application-specific engine management sensors for direct replacement use.

Key Features

• Specific-fit oxygen sensor for confirmed vehicle applications
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon female connector
• 8.19 in. wiring harness length
• 20-gauge, 1-wire configuration
• Overall length: 11.73 in.
• Fits upstream and downstream positions where listed

Product Details

Walker Products 350-31018 is engineered for direct replacement use in emissions control systems that rely on accurate oxygen sensor feedback. The sensor is manufactured for the specified application and fitment position so the ECU receives the expected signal for fuel control and diagnostic monitoring. This part is listed for select 1976-1996 Nissan and Jaguar vehicles, including 1996 Nissan Altima upstream, 1995 Nissan Sentra upstream and downstream, 1989-1995 Nissan 240SX upstream, and 1976-1979 Jaguar XJ6 upstream applications.

This part cross-references no additional part numbers in the provided data. Walker Products Aftermarket is the product line for engine management and oxygen/air-fuel sensors built around application-specific replacement fitment.

Common Issues This Sensor Can Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from a worn sensor signal
• Higher exhaust emissions from inaccurate air-fuel control
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Verify the vehicle’s year, make, model, emissions package, and sensor position before ordering. This part is listed for specific upstream and downstream locations, including Bank 1 Sensor 1 and Bank 1 Sensor 2 applications where noted. Inspect the sensor wiring harness and connector for physical damage before installation, since damaged wiring can shorten service life and affect signal quality.

For Nissan 200SX, Nissan Sentra, Nissan Altima, and Nissan Pickup applications, confirm the exact production date and emissions configuration shown in the fitment notes. For Jaguar XJ6 and Vanden Plas listings, match the OEM reference and connector details to the original sensor.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-31018 oxygen sensor is produced for the specified application and fitment position to support the diagnostic feedback expected by the ECU.