Walker 350-33031 Oxygen Sensor - Upstream

Walker 350-33031 Oxygen Sensor for Porsche

Walker Products 350-33031 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Porsche applications. It is engineered for upstream use on California-emissions vehicles and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for the listed Porsche applications
• Upstream sensor position
• 3-wire design with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon connector shape with female connector configuration
• Wiring harness length: 33.98 in.; overall length: 37.52 in.

Detailed Description

Walker Products Aftermarket 350-33031 is intended for 1983-1988 Porsche 944 upstream oxygen sensor applications and 1987-1988 Porsche 924 upstream oxygen sensor applications, including California emissions ESV vehicles. As an engine management sensor, it helps the ECU monitor exhaust oxygen content so the fuel system can maintain the correct air-fuel balance. This part number is built for the specified position and fitment, making it a direct replacement choice for Porsche 944 and Porsche 924 owners servicing an upstream sensor fault.

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. The brand line focuses on application-specific fitment and diagnostic feedback for modern engine control systems, which is important when replacing a sensor tied to fuel economy, emissions output, and MIL illumination.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions during inspection or operation
• Damaged sensor wiring or connector-related signal issues

Installation Notes and Tips

Confirm the vehicle is a 1983-1988 Porsche 944 or 1987-1988 Porsche 924 with the correct upstream California-emissions application before ordering. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Because this is a threaded sensor, verify thread diameter and mounting location match the original unit. If diagnostic codes are present, clear them after installation and verify the repair with a scan tool.

Quality Assurance

Walker Products is an automotive ISO 9001 / TS 16949 certified company with a long history in engine management and fuel system components. Part number 350-33031 is manufactured for the specified application and position to support proper ECU feedback in the listed Porsche fitments.