Walker 350-31010 Oxygen Sensor - Upstream

Walker 350-31010 Oxygen Sensor Overview

Walker Products 350-31010 is a specific-fit oxygen sensor engineered as an OE-style replacement for select Mazda and Ford applications. It is built for upstream placement and provides the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Compatible With 1990-1992 Ford Probe, upstream; 1990-1992 Mazda 626, upstream; 1990-1992 Mazda MX-6, upstream; and 1993-1995 Mazda RX-7, upstream.

Key Features

• Specific-fit oxygen sensor for targeted vehicle applications
• Upstream position for Bank 1 Sensor 1 and front sensor locations where listed
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Male connector with radiused polygon connector shape
• 19.41 in. wiring harness length and 20-gauge wire
• Overall length: 22.95 in.

Application Details

This Walker Products Aftermarket oxygen sensor is part number 350-31010 and is engineered for the specified fitment positions on the vehicle. It is intended for upstream exhaust monitoring on 1990-1992 Ford Probe, 1990-1992 Mazda 626, 1990-1992 Mazda MX-6, and 1993-1995 Mazda RX-7 models. Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement components, with application-specific fitment and ECU feedback requirements in mind.

This part cross-references no listed alternate part numbers in the provided data.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing sensor
• Diagnostic trouble codes stored in the ECU for sensor-related issues

Installation Notes

Confirm the vehicle’s exact year, make, model, and upstream sensor position before ordering. Inspect the sensor wiring harness and connector for physical damage during diagnosis, since damaged wiring can shorten sensor life and affect signal quality. Verify the threaded mounting location and connector style match the original unit before installation.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification. The 350-31010 is manufactured for the specified application and built to deliver the diagnostic feedback expected by the ECU.