Walker 350-64042 Oxygen Sensor - Upstream

Overview of Walker 350-64042 Oxygen Sensor for Subaru Legacy and Outback

The Walker 350-64042 oxygen sensor is designed specifically for Subaru Legacy and Outback models, providing precise emission control monitoring. This heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions compliance.

• Heated oxygen sensor with 4-wire configuration
• Specific fit for Subaru Legacy and Outback vehicles
• Threaded mounting type with 18.0 mm thread diameter
• 17.24 inches wiring harness length and 20.79 inches overall length
• Radiused polygon female connector for secure connection
• 20 gauge wire for reliable signal transmission

Detailed Features and Specifications

This Walker oxygen sensor (part number 350-64042) features a heated sensor type that allows for faster warm-up times and improved sensor response. The 4-wire design includes two wires for the heater circuit and two for the sensor signal, ensuring stable and accurate readings. The wiring harness length of 17.24 inches and overall length of 20.79 inches provide sufficient reach for installation in the exhaust system of Subaru Legacy and Outback models. The sensor mounts via a threaded connection with an 18.0 mm diameter, compatible with factory mounting points. The radiused polygon female connector ensures a secure and precise fit, reducing the risk of connection issues during operation.

Walker Products Aftermarket Line Information

The Walker Products Aftermarket line offers replacement emission control components engineered to meet or exceed OEM specifications. This oxygen sensor is part of that line, providing a reliable and direct-fit solution for Subaru vehicles. Walker Products Aftermarket parts are designed to maintain vehicle emissions performance and support compliance with environmental regulations.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light codes related to oxygen sensor failure
• Improves fuel efficiency by providing correct sensor data to the engine control unit
• Reduces harmful emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

When installing the Walker 350-64042 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness or connector. Confirm the radiused polygon female connector matches the vehicle’s harness for a secure fit. Thread the sensor carefully into the exhaust port to prevent cross-threading. After installation, clear any diagnostic trouble codes and verify sensor operation with a scan tool.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors undergo rigorous testing to meet industry standards for durability and performance. The 350-64042 part is manufactured to provide consistent sensor output and reliable heater function. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to ensure product reliability.