Walker 250-23103 Oxygen Sensor - Upstream

Overview of Walker 250-23103 Oxygen Sensor for Subaru Legacy

The Walker 250-23103 oxygen sensor is designed specifically for Subaru Legacy models, providing precise emission control and engine performance monitoring. This heated oxygen sensor ensures accurate readings for optimal fuel efficiency and reduced emissions.

• Heated oxygen sensor with 3-wire configuration
• Specific fit for Subaru Legacy vehicles
• 4.45-inch wiring harness length for easy installation
• 20 gauge wire for reliable signal transmission
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure connection
• Overall length of 7.99 inches

Detailed Product Description

The Walker 250-23103 oxygen sensor is a heated sensor designed to provide accurate air-fuel mixture data to the engine control unit (ECU) in Subaru Legacy vehicles. Featuring a 3-wire design and a 20 gauge wire measurement, this sensor ensures consistent electrical performance and durability. The wiring harness length of 4.45 inches allows for proper routing and connection without excess slack. Its radiused polygon male connector offers a secure and precise fit, minimizing the risk of disconnection or signal loss. The sensor mounts via a threaded 18.0 mm diameter fitting, compatible with the original equipment specifications of the Subaru Legacy. With an overall length of 7.99 inches, this oxygen sensor fits seamlessly into the vehicle’s emission control system.

Walker Products OE Brand Line

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality parts designed to meet or exceed factory specifications. The Walker Products OE line ensures that each sensor, including the 250-23103, is engineered for direct fitment and reliable performance in specific vehicle applications such as the Subaru Legacy.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate sensor 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 250-23103 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct 18.0 mm socket for removal and installation to prevent damage to the sensor or mounting threads. Verify the radiused polygon male connector is fully seated and locked to avoid electrical issues. Follow Subaru Legacy-specific service procedures for sensor replacement to maintain system integrity.

Quality Assurance and Warranty

Walker Products OE oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The 250-23103 part number is backed by Walker’s quality assurance protocols, ensuring reliable operation within Subaru Legacy emission systems. Warranty details are provided by Walker and typically cover defects in materials and workmanship under normal use.