Walker 250-24290 Oxygen Sensor - Downstream

Overview of Walker 250-24290 Oxygen Sensor

The Walker 250-24290 oxygen sensor is designed specifically for select Mazda and Subaru models, including the Mazda 626 and Subaru Impreza, Legacy, and Outback. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

• Heated sensor type for faster response times
• Specific fit for Mazda 626 and Subaru Impreza, Legacy, Outback
• 15.08-inch wiring harness length with 4 wires
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon female connector for secure connection
• Overall length of 18.62 inches for proper fitment
• 20 gauge wire for reliable signal transmission

Detailed Product Description

This Walker Products OE oxygen sensor (part number 250-24290) is engineered to meet the exact specifications of your vehicle’s original equipment. Featuring a heated sensor element, it quickly reaches operating temperature to provide accurate oxygen level readings, which are critical for maintaining efficient combustion and reducing emissions. The sensor includes a 15.08-inch wiring harness with four wires, allowing for proper electrical connections and compatibility with the vehicle’s engine control unit. Its radiused polygon female connector ensures a secure and precise fit, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering emission control components that match or exceed original equipment standards. This oxygen sensor is part of that line, ensuring it meets the durability and performance requirements expected by Mazda and Subaru vehicles. Using a Walker Products OE sensor helps maintain factory-level emissions compliance and engine efficiency.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in Mazda 626 and Subaru Impreza, Legacy, Outback
• Helps resolve rough idling and poor fuel economy caused by inaccurate oxygen readings
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents check engine light triggers related to oxygen sensor faults
• Improves engine performance by maintaining optimal combustion conditions

Installation Notes and Tips

When installing the Walker 250-24290 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector type matches the vehicle harness before installation. Properly torque the sensor to manufacturer specifications to prevent exhaust leaks. It is recommended to inspect wiring and connectors for damage during replacement.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards for fit, form, and function. This part number 250-24290 undergoes rigorous testing to ensure reliable performance in Mazda and Subaru vehicles. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship, supporting long-term durability and customer confidence.