Walker 350-34987 Oxygen Sensor - Downstream

Overview of Walker 350-34987 Oxygen Sensor

The Walker 350-34987 oxygen sensor is designed specifically for select Mazda, Scion, and Toyota models, including the CX-3, iA, MX-5 Miata, and Yaris. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data.

• Heated sensor type for faster response times
• Specific fit for Mazda CX-3, Scion iA, Toyota MX-5 Miata, and Yaris models
• 12.59-inch wiring harness length with 4 wires
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon female connector for secure connection
• 20 gauge wire for reliable signal transmission
• Overall length of 15.74 inches for proper installation

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 maintaining factory-level emissions performance in vehicles like the Mazda CX-3 and Toyota Yaris.

Product Features and Specifications

The Walker 350-34987 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 sensor heating and signal output, while the 20 gauge wiring ensures consistent electrical performance. The radiused polygon female connector provides a secure and corrosion-resistant connection, and the threaded mounting with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for engine control units
• Helps resolve rough idling and poor fuel economy issues
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates check engine light codes related to oxygen sensor failure
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Walker 350-34987 oxygen sensor, ensure the vehicle is compatible with this specific part number. The threaded mounting requires proper torque to avoid exhaust leaks. Handle the sensor carefully to prevent damage to the heated element and wiring harness. It is recommended to disconnect the battery before installation and clear any diagnostic trouble codes after replacement.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. The 350-34987 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.