Walker 350-34378 Oxygen Sensor - Downstream

Overview of Walker 350-34378 Oxygen Sensor

The Walker 350-34378 oxygen sensor is designed specifically for Mercury Quest and Nissan Villager models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor with 4-wire design for precise readings
• Specific fit for Mercury Quest and Nissan Villager vehicles
• 48.35 inches wiring harness length for flexible installation
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon female connector for secure connection
• Wire gauge measurement of 20 for durability and signal integrity
• Overall length of 51.89 inches to accommodate vehicle fitment

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-34378) is engineered to meet the exact specifications of Mercury Quest and Nissan Villager models. Featuring a heated sensor type, it quickly reaches operating temperature to provide accurate oxygen level readings, which are critical for maintaining proper air-fuel mixture and reducing emissions. The sensor includes a 4-wire configuration with a 20-gauge wire size, ensuring reliable electrical performance and signal transmission.

The sensor’s wiring harness length of 48.35 inches and overall length of 51.89 inches provide ample reach for installation in the exhaust system. Its threaded mounting type with an 18.0 mm diameter allows for secure and precise placement. The radiused polygon female connector ensures a proper fit with the vehicle’s wiring harness, minimizing the risk of connection issues.

Walker Products Aftermarket Line

The Walker Products Aftermarket line focuses on providing replacement emission control components that meet or exceed OEM standards. This oxygen sensor is part of that line, offering a reliable and vehicle-specific solution for maintaining emissions compliance and engine efficiency in Mercury and Nissan vehicles.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper engine management
• Helps resolve rough idling and poor fuel economy
• Reduces emissions-related check engine light triggers
• Prevents failed emissions tests due to faulty sensor readings
• Improves overall exhaust system performance

Installation Notes and Tips

When installing the Walker 350-34378 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector shape and gender match the vehicle harness before installation. Proper torque should be applied to the 18.0 mm threaded sensor to prevent leaks or sensor damage.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details for part number 350-34378 should be confirmed at purchase, Walker typically offers coverage against defects in materials and workmanship to ensure long-term reliability.