Walker 350-34093 Oxygen Sensor - Downstream

Overview of Walker Oxygen Sensor for Toyota Highlander

The Walker 350-34093 oxygen sensor is designed specifically for Toyota Highlander models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon female connector for secure installation.

• Wiring harness length: 29.06 inches
• Wire gauge measurement: 20 gauge
• Heated sensor type for faster response
• Specific fit for Toyota Highlander
• Four-wire configuration with radiused polygon female connector
• Thread diameter: 18.0 mm
• Overall length: 32.6 inches
• Threaded mounting for reliable attachment

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components engineered to meet or exceed OEM specifications. The line emphasizes precise fitment and durability, making it suitable for specific vehicle applications such as the Toyota Highlander. The 350-34093 sensor maintains the quality standards expected from Walker while offering a direct replacement solution.

Product Description and Features

The Walker 350-34093 oxygen sensor is a heated sensor designed to provide accurate air-fuel mixture readings to the engine control unit. Its four-wire design includes a heating element that allows the sensor to reach operating temperature quickly, improving emissions control and fuel efficiency. The sensor’s 18.0 mm threaded mounting ensures a secure fit in the exhaust system, while the radiused polygon female connector facilitates a reliable electrical connection. With a wiring harness length of 29.06 inches and an overall length of 32.6 inches, this sensor is tailored for the Toyota Highlander’s specific requirements.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper engine management
• Helps reduce exhaust emissions by maintaining correct air-fuel ratio
• Resolves engine performance issues related to faulty oxygen sensors
• Prevents check engine light triggers caused by sensor failure
• Improves fuel economy by ensuring efficient combustion

Installation Notes and Tips

When installing the Walker 350-34093 oxygen sensor on a Toyota Highlander, ensure the sensor is threaded securely into the exhaust manifold or pipe without cross-threading. Verify the connector matches the vehicle’s wiring harness to avoid electrical issues. It is recommended to use anti-seize compound on the threads to facilitate future removal. Always disconnect the battery before installation to prevent electrical shorts.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. The 350-34093 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 in Toyota Highlander vehicles.