Walker 350-34028 Oxygen Sensor - Upstream

Overview of Walker 350-34028 Oxygen Sensor

The Walker 350-34028 oxygen sensor is designed specifically for Ford Focus and Transit Connect models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated sensor type for faster response times
• Specific fit for Ford Focus and Transit Connect vehicles
• 16.26-inch wiring harness length with 4 wires
• 20 gauge wire for reliable signal transmission
• Radiused polygon male connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 19.8 inches for proper installation

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components that meet or exceed OEM specifications. The line emphasizes precise fitment and durability, making it suitable for maintaining factory-level performance in Ford vehicles such as the Focus and Transit Connect.

Product Features and Specifications

The Walker 350-34028 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 4-wire design includes a dedicated heater circuit and signal wires, ensuring accurate oxygen level readings. The radiused polygon male connector provides a secure and reliable electrical connection, while the threaded mounting type with an 18.0 mm diameter ensures proper installation and sealing in the exhaust system.

Common Applications and Problem Resolution

• Restores accurate air-fuel mixture readings for Ford Focus and Transit Connect
• Helps resolve rough idling and poor fuel economy issues
• Reduces engine hesitation and misfires caused by faulty oxygen sensors
• Supports emission system compliance by maintaining proper sensor function
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Walker 350-34028 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the radiused polygon male connector is fully seated and locked to prevent electrical issues. Thread the sensor carefully to avoid cross-threading and tighten to manufacturer torque specifications.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. The 350-34028 part number undergoes rigorous testing to ensure compatibility with Ford Focus and Transit Connect models. While specific warranty details vary, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability.