Walker 350-64021 Oxygen Sensor - Upstream

Overview of Walker 350-64021 Oxygen Sensor

The Walker 350-64021 oxygen sensor is designed specifically for select Saab and Subaru models, including the 9-2X, Baja, Forester, Impreza, Legacy, Outback, WRX, and WRX STI. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector, ensuring precise fitment and reliable performance.

• Heated oxygen sensor for accurate emissions control
• Specific fit for Saab 9-2X and Subaru models like Forester and WRX
• 29.06-inch wiring harness length with 4 wires of 20 gauge
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for secure connection
• Overall length of 32.6 inches for proper installation

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-64021) is engineered to meet the exact specifications required by Saab and Subaru vehicles. The sensor is heated, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 4-wire design with 20 gauge wiring ensures reliable signal transmission, while the 29.06-inch wiring harness length provides sufficient reach for installation in the specified vehicle models. The radiused polygon male connector and threaded mounting type with an 18.0 mm thread diameter guarantee a secure and precise fit, minimizing installation issues.

Compatible Vehicles and Applications

• Saab 9-2X
• Subaru Baja
• Subaru Forester
• Subaru Impreza
• Subaru Legacy
• Subaru Outback
• Subaru WRX and WRX STI

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor engine performance
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Reduced fuel efficiency from delayed sensor response
• Engine hesitation or rough idling linked to oxygen sensor failure

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Use the correct tools to remove the old sensor and install the Walker 350-64021 oxygen sensor, taking care to avoid damaging the wiring harness or connector. Verify the connector shape and gender match the vehicle’s harness for a proper connection. Thread the sensor carefully into the exhaust manifold or pipe to the specified torque to prevent leaks or damage.

Quality Assurance and Warranty

Walker Products Aftermarket parts are manufactured to meet or exceed OEM standards. The 350-64021 oxygen sensor undergoes rigorous testing to ensure durability and performance in emission control systems. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.