Walker 350-31004 Oxygen Sensor - Upstream

Walker 350-31004 Oxygen Sensor for Porsche 944

Walker Products 350-31004 is a specific-fit, non-heated oxygen sensor engineered as an OE-style replacement for select Porsche 944 applications. It is built for upstream Bank 1 Sensor 1 placement and is listed for non-California emissions vehicles, making it a direct-fit option for the correct emission-control setup.

Key Features

• Part number: 350-31004
• Brand line: Walker Products Aftermarket
• Sensor type: Non Heated
• Specific fit for the listed application
• Upstream mounting position
• Threaded installation with 18.0 mm thread diameter
• Female connector with radiused polygon shape
• 31.61 in. wiring harness length
• 20-gauge wire with 1-wire design

Product Details

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. This 350-31004 oxygen sensor is matched to the application, fitment position, and ECU feedback requirements for the listed Porsche 944 models. It is designed for 1983-1985 Porsche 944 upstream use, including Bank 1 Sensor 1 locations on vehicles without California emissions certification. The Walker Products Aftermarket line focuses on application-specific sensor coverage for emission control service work, and 350-31004 follows that approach with the correct connector, harness length, and threaded mounting style.

Fits 1983-1985 Porsche 944, upstream. Fits 1983-1985 Porsche 944, upstream Bank 1 Sensor 1. Fits 1983-1985 Porsche 944, upstream for non-California emissions-certified vehicles.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from a failing upstream sensor
• Higher exhaust emissions from inaccurate air-fuel monitoring
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a non-California emissions Porsche 944 before ordering. Verify upstream Bank 1 Sensor 1 placement, connector style, thread diameter, and harness length against the original sensor. Inspect the sensor wiring harness and connector for damage before installation, since physical wear can shorten service life and affect signal quality.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-31004 is built as an OE replacement oxygen sensor for the specified application and fitment position.