Walker 350-31006 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear

Walker 350-31006 Oxygen Sensor Overview

Walker Products 350-31006 is a specific-fit oxygen sensor engineered as an OE-style replacement for select Toyota, Lexus, and Geo applications. It is built for upstream monitoring positions and supports the ECU with the feedback needed to manage fuel control and emissions performance.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for application-specific fitment. This part number is matched to the vehicle position and connector style required for the listed applications, including Toyota Camry, Toyota Celica, Toyota Corolla, Lexus ES300, and Geo Prizm coverage.

Key Features

• Part number: 350-31006
• Specific-fit oxygen sensor for listed upstream applications
• Non-heated sensor design
• Flange mount installation
• 18.0 mm thread diameter
• 10.35 wiring harness length with 20-gauge wire
• Radiused polygon male connector
• Overall length: 13.9

Detailed Application Fitment

Fits 1992-1995 Toyota Camry, upstream oxygen sensor applications, including California emissions ESV and non-California ESV configurations listed for Bank 1 Sensor 1. Fits 1992-1995 Toyota Celica, upstream oxygen sensor applications, including California-ESV and non-California emissions configurations listed for Bank 1 Sensor 1. Fits 1993-1995 Toyota Corolla, upstream oxygen sensor applications for California-ESV vehicles. Fits 1992-1993 Lexus ES300, upstream front and upstream rear positions for the listed California-ESV and non-California emissions configurations. Fits 1993-1995 Geo Prizm, upstream oxygen sensor applications for California-ESV vehicles.

What This Oxygen Sensor Helps Address

• Check engine light triggered by oxygen sensor fault codes
• Poor engine operation caused by incorrect exhaust feedback
• Higher fuel consumption from inaccurate air-fuel control
• Increased exhaust emissions from a failing upstream sensor
• Damaged sensor wiring, harness, or connector issues at the sensor location

Installation Notes

Confirm the sensor position, emissions calibration, connector shape, and thread size before installation. This part is listed for specific upstream locations only, so match the vehicle year, make, model, and emissions configuration exactly. Inspect the sensor wiring harness and connector for physical damage before replacement, since damaged wiring can shorten sensor life and affect ECU feedback.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-31006 is manufactured for the specified application and position to provide the diagnostic feedback expected by the ECU.