Walker 350-35027 Oxygen Sensor - Upstream Left or Upstream Right

Walker Products Oxygen Sensor for Porsche and Audi

Walker Products part number 350-35027 is a heated oxygen sensor built for specific OE-style fitment and accurate ECU feedback. It is engineered for upstream right or upstream left positions on select Porsche 911 applications and the Audi A8 Quattro, making it a direct replacement for vehicles that need precise exhaust monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for application-specific fitment. The 350-35027 follows that approach with a threaded, 5-wire heated design and a connector layout matched to the vehicle position, helping maintain proper sensor communication with the engine control unit.

Key Features

• Part number 350-35027 for specific Porsche and Audi applications
• Heated oxygen sensor for faster operating response
• Specific fit design for correct upstream right or upstream left placement
• 5-wire configuration with 20-gauge wiring
• 26.1 in. wiring harness length and 29.65 in. overall length
• 18.0 mm threaded mounting type
• Radiused polygon male connector for application-specific connection

Detailed Description

This Walker Products oxygen sensor is intended for vehicles that rely on accurate exhaust oxygen feedback to manage fuel delivery and emissions control. It is a direct-fit replacement for 2006-2011 Porsche 911 models in upstream left or upstream right positions, and for 2007-2010 Audi A8 Quattro in the upstream right position. If you are replacing a failing sensor on a Porsche 911 or Audi A8 Quattro, part number 350-35027 provides the correct application-specific configuration.

Walker Products has developed engine management sensors as OE replacement components for worldwide vehicle coverage, with manufacturing focused on fitment position and ECU feedback requirements. The 350-35027 is built as a threaded, heated oxygen sensor with the connector and harness layout matched to the listed applications.

What This Sensor Helps Address

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

Installation Notes and Tips

• Verify the vehicle position before ordering: upstream right or upstream left for Porsche 911, upstream right for Audi A8 Quattro.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Confirm the 18.0 mm threaded mounting point matches the original sensor location.
• Use the existing vehicle-specific routing and connector orientation to avoid strain on the harness.
• After installation, clear diagnostic trouble codes and confirm normal ECU feedback.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with a long history in engine management and fuel system components. The 350-35027 is manufactured as a specific-fit replacement sensor for the listed Porsche 911 and Audi A8 Quattro applications.