Walker 350-34997 Oxygen Sensor - Downstream

Overview of Walker 350-34997 Oxygen Sensor

The Walker 350-34997 oxygen sensor is designed specifically for select Audi, Ford, and Volkswagen models, including the A3, Escape, Jetta, and Transit Connect. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

• Heated sensor type for faster activation
• Specific fit for Audi A3, Ford Escape, Volkswagen Jetta, and Transit Connect
• 29.06-inch wiring harness length for convenient installation
• 20 gauge wire with 4-wire configuration
• Female connector with 18mm thread diameter
• Overall length of 32.6 inches

Detailed Product Features and Specifications

This oxygen sensor from Walker Products Aftermarket features a heated sensor element that allows quicker warm-up times, improving emissions control during cold starts. The 4-wire design includes two wires for the heater circuit and two for the sensor signal, ensuring reliable operation and accurate readings. The wiring harness length of 29.06 inches provides sufficient reach for proper routing in the engine bay. The sensor’s 18mm thread diameter matches OEM specifications for a secure fit. The female connector is designed to mate precisely with the vehicle’s wiring harness, reducing installation errors.

Walker Products Aftermarket Line Information

Walker Products Aftermarket offers a range of emission control components engineered to meet or exceed OEM standards. This product line focuses on delivering reliable, vehicle-specific parts that maintain factory performance and emissions compliance. The 350-34997 oxygen sensor is part of this line, providing a direct replacement solution for targeted Audi, Ford, and Volkswagen models.

Applications and Common Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Helps resolve check engine light triggers related to oxygen sensor faults
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

Before installation, verify compatibility with your vehicle’s make and model, specifically Audi A3, Ford Escape, Volkswagen Jetta, or Transit Connect. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Ensure the sensor is threaded in securely with the correct torque to prevent exhaust leaks. The 4-wire connector should be matched carefully to the vehicle’s harness to maintain proper electrical connections.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, these sensors typically come with a limited warranty covering defects in materials and workmanship. Using a genuine Walker sensor helps maintain your vehicle’s emissions compliance and engine efficiency.