Walker 250-54015 Oxygen Sensor - Upstream

Overview of Walker 250-54015 Oxygen Sensor for Subaru Vehicles

The Walker 250-54015 oxygen sensor is designed specifically for Subaru Impreza, Legacy, and Outback models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor with 4 wires for precise readings
• Specific fit for Subaru Impreza, Legacy, and Outback
• 12.52-inch wiring harness length for flexible installation
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure connection
• Overall length of 16.06 inches for proper fitment
• 20 gauge wire for durability and signal integrity

Detailed Product Features and Specifications

This Walker Products OE oxygen sensor (part number 250-54015) is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. The sensor includes a 12.52-inch wiring harness and four wires, allowing for accurate signal transmission and compatibility with the vehicle’s engine control unit. The radiused polygon male connector ensures a secure and reliable electrical connection, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Walker Products OE is a product line focused on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of that line, ensuring it matches the fit, form, and function required by Subaru vehicles such as the Impreza, Legacy, and Outback.

Applications and Common Issues Addressed

• Helps maintain proper air-fuel mixture for efficient combustion
• Reduces harmful emissions by providing accurate exhaust gas data
• Prevents engine performance issues related to faulty oxygen sensors
• Resolves check engine light triggers caused by sensor failure
• Improves fuel economy by enabling precise engine adjustments

Installation Notes and Tips

When installing the Walker 250-54015 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Verify the radiused polygon male connector is fully seated and locked to avoid electrical issues. This sensor is designed for specific Subaru models, so confirm compatibility before installation.

Quality Assurance and Warranty Information

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