Walker 250-25103 Oxygen Sensor - Upstream or Upstream Left

Overview of Walker 250-25103 Oxygen Sensor for Ford Vehicles

The Walker 250-25103 oxygen sensor is designed specifically for select Ford models including Fusion and Transit series. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor with 5-wire configuration
• Specific fit for Ford Fusion, Transit, Transit-150, Transit-250, Transit-350, and Transit-350 HD
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wiring harness length of 17.24 inches and overall length of 20.79 inches
• Wire gauge measurement of 20 for reliable signal transmission

Detailed Features and Specifications

This Walker Products OE oxygen sensor (part number 250-25103) is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. The 5-wire design supports both sensor heating and signal output, ensuring consistent operation under various engine conditions. The radiused polygon male connector offers a precise fit to the vehicle’s wiring harness, reducing the risk of connection issues. With a threaded mounting type and an 18.0 mm thread diameter, installation aligns with factory specifications for the compatible Ford models.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering emission control components that meet original equipment standards. This oxygen sensor is part of that line, providing a direct replacement solution that maintains the integrity of the vehicle’s emissions system. Using parts from the Walker Products OE line helps ensure compatibility and performance consistent with factory-installed components.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Resolves check engine light issues related to oxygen sensor faults
• Improves fuel economy by providing precise exhaust gas readings
• Reduces harmful emissions by maintaining proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

When installing the Walker 250-25103 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness or connector. Verify the connector’s radiused polygon shape and male gender match the vehicle’s harness before installation. Thread the sensor carefully to prevent cross-threading and torque to manufacturer specifications for a secure fit.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain compliance with emissions regulations and supports long-term vehicle reliability.