Walker 250-54011 Oxygen Sensor - Upstream

Overview of Walker 250-54011 Oxygen Sensor for Acura and Subaru

The Walker 250-54011 oxygen sensor is designed specifically for select Acura and Subaru models, including the Baja, EL, Forester, Impreza, Legacy, and Outback. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fit for Acura and Subaru models to ensure proper installation
• Threaded mounting type with 18.0 mm thread diameter for secure attachment
• Radiused polygon female connector for exact electrical connection
• Wiring harness length of 19.61 inches and overall length of 23.15 inches
• Wire gauge measurement of 20 for durability and signal integrity

Detailed Features and Specifications

This Walker oxygen sensor (part number 250-54011) features a heated sensor type that allows for faster warm-up times and improved emissions monitoring. The 4-wire configuration supports both the sensor element and the heater circuit, enhancing responsiveness and accuracy. The sensor’s threaded mounting type with an 18.0 mm diameter ensures a secure fit in the exhaust system. The radiused polygon female connector is designed to match factory wiring harnesses, simplifying installation and reducing the risk of connection issues. With a wiring harness length of 19.61 inches and an overall length of 23.15 inches, this sensor fits precisely in the designated locations on compatible Acura and Subaru vehicles.

Walker Products OE Brand Line

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of the Walker Products OE series, which emphasizes precise fitment and reliable performance for emission control components. Using parts from this line helps maintain factory-level emissions standards and engine efficiency in Acura and Subaru vehicles.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel economy by ensuring correct sensor feedback
• Reduces harmful emissions by maintaining proper exhaust monitoring
• Prevents engine performance problems caused by faulty sensor readings

Installation Notes and Tips

When installing the Walker 250-54011 oxygen sensor, ensure the vehicle is compatible with the specified Acura and Subaru models. Use appropriate tools to avoid damaging the threaded mounting or connector. Verify the connector’s radiused polygon shape and female gender match the vehicle’s wiring harness. It is recommended to replace the sensor when the engine and exhaust system are cool to prevent injury and ensure proper torque application.

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.