Walker 350-34433 Oxygen Sensor - Downstream Left or Downstream Right

Overview of Walker 350-34433 Oxygen Sensor

The Walker 350-34433 oxygen sensor is designed specifically for select BMW models, including the 545i, 645Ci, 745i, 745Li, 760i, 760Li, M5, M6, and X5. This heated oxygen sensor provides precise emissions control and helps maintain optimal engine performance.

• Heated sensor type for faster warm-up and accurate readings
• Specific fit for BMW models ensuring proper installation and function
• 15.28-inch wiring harness length for flexible routing
• 20 gauge wire measurement with 4 wires for reliable signal transmission
• Radiused polygon female connector for secure electrical connection
• Threaded mounting type with 18.0 mm thread diameter for easy installation
• Overall length of 18.82 inches to accommodate OEM specifications

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components that meet or exceed OEM standards. The line emphasizes precise fitment and durability, making it suitable for maintaining the emission systems of BMW vehicles listed in the fitment.

Product Description and Specifications

The Walker 350-34433 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The 15.28-inch wiring harness length offers sufficient reach for installation without modification, while the radiused polygon female connector ensures a secure and corrosion-resistant connection. The threaded mounting type with an 18.0 mm diameter matches OEM specifications for a straightforward replacement process. This sensor is engineered specifically for BMW models such as the 545i, 645Ci, 745i, 745Li, 760i, 760Li, M5, M6, and X5, ensuring compatibility and reliable operation.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel mixture for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance issues related to faulty sensors
• Resolves check engine light triggers caused by oxygen sensor faults
• Improves fuel economy by enabling precise engine management

Installation Notes and Tips

When installing the Walker 350-34433 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct tools to remove the old sensor and avoid damaging the wiring harness. Verify the connector type matches the vehicle’s harness before installation. Thread the sensor carefully to prevent cross-threading and tighten to manufacturer torque specifications. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. The 350-34433 part number undergoes rigorous testing to ensure durability and reliable performance in emission control systems. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term use.