Walker 350-31009 Oxygen Sensor - Upstream

Walker 350-31009 Oxygen Sensor for Porsche

Walker Products 350-31009 is a specific-fit, non-heated oxygen sensor engineered as an OE-style replacement for select Porsche applications. It is built for upstream placement and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

For Porsche 911, Porsche 924, and Porsche 928 applications, this Walker Products Aftermarket sensor supports accurate exhaust feedback when the original sensor has aged or failed. The 350-31009 uses a threaded mount, female radiused polygon connector, and a 16.26-inch wiring harness for the listed fitments.

Key Features

• Part number: 350-31009
• Specific-fit oxygen sensor for select Porsche models
• Upstream sensor position
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• Female radiused polygon connector
• 16.26-inch wiring harness length
• 20-gauge wire construction
• Overall length: 19.8 inches

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as replacement parts for original equipment applications, with fitment matched to the vehicle, sensor location, and ECU feedback requirements. This makes the 350-31009 a practical choice for drivers servicing an upstream oxygen sensor on a Porsche 911, Porsche 924, or Porsche 928 from the listed model years. The part number 350-31009 is also identified by Walker Products Aftermarket for these applications.

Walker Products has supplied engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification. The brand’s product line focuses on application-specific sensor replacement for vehicles that rely on accurate exhaust data to manage fuel delivery and emissions performance.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from a failing upstream sensor
• Elevated exhaust emissions from incorrect air-fuel correction
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Fits 1980-1983 Porsche 911, upstream. Fits 1980-1982 Porsche 924, upstream. Fits 1980-1982 Porsche 928, upstream. Confirm the sensor position before ordering, since this part is specified for upstream use only. Inspect the sensor, wiring harness, and connector for physical damage during diagnosis, and verify the threaded mount and connector style match the vehicle before installation.

For Porsche 911, Porsche 924, and Porsche 928 service, the 350-31009 should be matched to the exact application listed above. This part cross-references Bosch (e.g., 13077) for the same application.

Quality Assurance

Walker Products manufactures this oxygen sensor as an application-specific replacement for the listed Porsche fitments and backs its engine management product line with long-standing OE replacement experience and ISO-certified manufacturing practices.