Walker 350-34928 Oxygen Sensor - Downstream

Overview of Walker 350-34928 Oxygen Sensor for Audi, Porsche, Volkswagen

The Walker 350-34928 oxygen sensor is designed specifically for select Audi, Porsche, and Volkswagen models, including the A4, A5 Quattro, Jetta, Macan, and Q7. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fit for Audi, Porsche, and Volkswagen vehicles
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wiring harness length of 14.29 inches and overall length of 17.83 inches
• Wire gauge measurement of 20 for durability and signal integrity

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components engineered to meet or exceed OEM specifications. The line emphasizes precise fitment and reliable sensor performance, making it suitable for maintaining factory-level emissions compliance on vehicles like the Audi A4 allroad and Porsche Macan.

Technical Description and Features

The Walker 350-34928 oxygen sensor features a heated sensor element that allows for faster warm-up times and improved sensor response under various operating conditions. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The radiused polygon male connector is designed for a secure and corrosion-resistant connection, while the threaded mounting type with an 18.0 mm diameter ensures proper installation and sealing. The wiring harness length of 14.29 inches and overall length of 17.83 inches provide adequate reach for installation in the engine bay of compatible Audi, Porsche, and Volkswagen models.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Resolves check engine light issues related to oxygen sensor faults
• Helps reduce vehicle emissions to meet regulatory standards
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports proper catalytic converter function by providing accurate data

Installation Notes and Tips

When installing the Walker 350-34928 oxygen sensor, ensure the engine is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the connector type matches the vehicle harness before installation. Thread the sensor by hand initially to avoid cross-threading, then tighten to manufacturer torque specifications. Inspect wiring for damage and secure the harness to prevent contact with hot or moving parts.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The 350-34928 part number is backed by Walker's quality assurance protocols, providing confidence in fitment and function for Audi, Porsche, and Volkswagen vehicles. Warranty details are available through authorized distributors and typically cover defects in materials and workmanship.