Walker 350-34479 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Overview of Walker Oxygen Sensor 350-34479

The Walker 350-34479 oxygen sensor is designed specifically for select Lexus and Toyota models, including the 4Runner, FJ Cruiser, GX460, Land Cruiser, LX570, Sequoia, Tacoma, Tundra, and Venza. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance.

• Heated sensor type for faster response times
• Specific fit for Lexus and Toyota vehicles
• 7.4-inch wiring harness length with 20 gauge wire
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector with 4 wires
• Overall length of 10.94 inches for precise installation

Detailed Product Features and Specifications

The Walker 350-34479 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor includes a 7.4-inch wiring harness made with 20 gauge wire, providing durability and reliable electrical connectivity. Its 4-wire configuration supports both the sensor signal and heater circuit. The radiused polygon male connector ensures a secure and specific fit, minimizing installation errors. The threaded mounting type with an 18.0 mm diameter allows for straightforward replacement in compatible exhaust systems. With an overall length of 10.94 inches, this sensor fits precisely in the designated locations on compatible Lexus and Toyota models.

Walker Products Aftermarket Line

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable emission control components designed to meet or exceed OEM specifications. Walker Products Aftermarket parts are engineered for direct fitment and performance, making them suitable replacements for original equipment sensors in Lexus and Toyota vehicles.

Applications and Common Issues Addressed

• Restores accurate oxygen level readings for engine control units
• Helps resolve rough idling and poor fuel economy
• Reduces emissions-related check engine light triggers
• Prevents failed emissions tests due to faulty sensors
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Walker 350-34479 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 male connector aligns correctly with the vehicle’s harness. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications. Verify all connections are secure before starting the engine.

Quality Assurance and Warranty

Walker oxygen sensors undergo rigorous testing to meet emission control standards and provide reliable performance. The 350-34479 sensor is manufactured to precise specifications for Lexus and Toyota applications. Warranty details are provided by Walker Products Aftermarket and typically cover defects in materials and workmanship under normal use.