Walker 350-34212 Oxygen Sensor - Downstream

Overview of Walker 350-34212 Oxygen Sensor

The Walker 350-34212 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 for flexible installation
• Four-wire design with 20 gauge wire for reliable signal transmission
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon female connector for secure connection
• Overall length of 18.62 inches for proper fitment

Detailed Product Description

This Walker oxygen sensor (part number 350-34212) is engineered to meet the exact specifications of your vehicle’s emission system. Featuring a heated sensor element, it quickly reaches operating temperature to provide accurate oxygen level readings. The four-wire configuration includes two wires for the heater circuit and two for the sensor signal, ensuring consistent performance. The 15.08-inch wiring harness length and radiused polygon female connector allow for straightforward installation without modifications. Its threaded mounting type with an 18.0 mm diameter ensures a secure and leak-free fit in the exhaust manifold or pipe.

Walker Products Aftermarket offers this sensor as part of their emission control sensor line, focusing on delivering reliable, vehicle-specific components that maintain factory-level emissions compliance. This product line emphasizes precise fitment and durability, supporting proper engine management and reduced emissions.

Compatible Vehicles and Applications

• Mazda 626 models requiring a specific heated oxygen sensor
• Subaru Impreza oxygen sensor replacement
• Subaru Legacy emission control sensor upgrade
• Subaru Outback oxygen sensor for emission regulation

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions and failed emissions tests
• Engine hesitation or rough idling caused by sensor malfunction
• Reduced engine performance linked to inaccurate oxygen sensing

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate oxygen sensor socket for threaded removal and installation
• Do not over-tighten; torque to manufacturer specifications
• Check connector compatibility with the radiused polygon female plug
• Inspect wiring harness for damage before installation

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet or exceed OEM standards for fit, form, and function. The 350-34212 sensor undergoes rigorous testing to ensure durability and reliable performance under normal operating conditions. While specific warranty details may vary, Walker typically offers a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.