Walker 350-34429 Oxygen Sensor - Downstream Rear or Upstream

Overview of Walker 350-34429 Oxygen Sensor

The Walker 350-34429 oxygen sensor is designed specifically for select Audi and Volkswagen models, including the R32, S3, and TT Quattro. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance through precise air-fuel mixture readings.

• Heated sensor type for faster activation and improved efficiency
• Specific fit for Audi and Volkswagen R32, S3, and TT Quattro models
• 11.34-inch wiring harness length with 4 wires of 22 gauge
• Radiused polygon male connector for secure and reliable connection
• Threaded mounting type with an 18.0 mm thread diameter
• Overall length of 14.88 inches for proper installation depth

Detailed Product Description

This Walker oxygen sensor (part number 350-34429) is engineered to meet the exact specifications required by Audi and Volkswagen vehicles such as the R32, S3, and TT Quattro. Featuring a heated sensor element, it reaches operating temperature quickly, providing accurate oxygen level readings to the engine control unit. The sensor includes a radiused polygon male connector with four 22-gauge wires, ensuring a secure electrical connection and reliable signal transmission. The 11.34-inch wiring harness length and 14.88-inch overall length allow for proper routing and fitment within the vehicle’s emission system. The threaded mounting type with an 18.0 mm diameter ensures a tight and secure installation.

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on delivering replacement emission control components that meet or exceed OEM standards. Walker Products Aftermarket parts are designed to provide reliable performance and durability, making them suitable for professional repairs and maintenance on European vehicles.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring proper catalytic converter function
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports smooth engine performance and drivability in Audi and Volkswagen models

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old sensor to avoid burns
• Use appropriate tools for threaded sensor removal and installation
• Verify connector compatibility with the radiused polygon male plug
• Route wiring harness carefully to avoid contact with hot or moving parts
• Check for proper torque on the 18.0 mm threaded mounting to prevent leaks

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. Each sensor undergoes rigorous testing to ensure durability and accurate performance. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability in emission control applications.