Walker 350-34509 Oxygen Sensor - Center, Downstream Left or Upstream

Overview of Walker 350-34509 Oxygen Sensor

The Walker 350-34509 oxygen sensor is designed specifically for select Audi and Volkswagen models, including the A4, A4 Quattro, A6, A6 Quattro, Bora, and Polo. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fit for Audi and Volkswagen models such as A4, A6, Bora, and Polo
• Threaded mounting type with 18.0 mm thread diameter for secure installation
• 21.18 inches wiring harness length and 24.72 inches overall length for proper fitment
• Radiused polygon male connector for exact OEM compatibility
• 20 gauge wire for durability and signal integrity

Detailed Product Description

This Walker oxygen sensor (part number 350-34509) is a heated sensor designed to provide fast and accurate readings of oxygen levels in the exhaust gases. The 4-wire configuration includes two wires for the heating element and two for the sensor signal, ensuring quicker sensor activation and improved emissions control. The sensor features a threaded mounting type with an 18.0 mm diameter, allowing for a secure and precise fit in the exhaust system. The wiring harness length of 21.18 inches and overall length of 24.72 inches are engineered to match the specific routing requirements of compatible Audi and Volkswagen vehicles. The radiused polygon male connector ensures a proper connection with the vehicle’s wiring harness, reducing the risk of electrical issues.

Walker Products Aftermarket Line

Walker Products Aftermarket offers a range of emission control components designed to meet or exceed OEM specifications. This product line focuses on delivering reliable and durable parts for emission sensors, including oxygen sensors like the 350-34509. By using Walker Products Aftermarket parts, technicians and vehicle owners can maintain proper emissions performance and comply with environmental regulations.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Helps resolve check engine light codes related to oxygen sensor failure
• Reduces emissions by ensuring proper catalytic converter function
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports smooth engine performance in Audi A4, A6, and Volkswagen Bora and Polo models

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old sensor to avoid burns
• Use appropriate oxygen sensor socket for threaded removal and installation
• Verify connector type matches the vehicle harness before installation
• Do not over-tighten the sensor; follow manufacturer torque specifications
• Check wiring harness routing to prevent damage or interference

Quality Assurance and Warranty

Walker oxygen sensors are manufactured to meet strict quality standards for durability and performance. The 350-34509 sensor undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Walker Products Aftermarket parts typically include coverage against defects in materials and workmanship to provide confidence in product longevity.