Denso 234-4779 Oxygen Sensor - Downstream

Overview of the Denso OE Style Oxygen Sensor 234-4779

The Denso OE Style Oxygen Sensor 234-4779 is designed specifically for select Mercury and Nissan vehicles, including the Quest and Villager models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor for faster response times
• Specific fit for Mercury Quest and Nissan Villager
• Threaded mounting type with 0.708 inch thread diameter
• Four-wire design with male connector for secure connection
• 32.68 inches wiring harness length for proper installation

Detailed Features and Specifications

This oxygen sensor features a heated sensor type that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 234-4779 part number corresponds to a specific fitment, ensuring compatibility with Mercury Quest and Nissan Villager models. It includes a four-wire configuration with a male connector, providing reliable electrical connections. The sensor mounts via a threaded design with a 0.708 inch thread diameter, facilitating straightforward installation. The wiring harness length of 32.68 inches offers sufficient reach for proper placement within the vehicle’s exhaust system.

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications. This oxygen sensor is engineered to match the fit, form, and function of the factory-installed sensor, making it a suitable replacement for maintaining vehicle performance and emissions compliance. The OE Style designation indicates that this sensor is designed to integrate seamlessly with the vehicle’s existing systems without modification.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light codes related to oxygen sensor failure
• Improves fuel economy by ensuring efficient combustion
• Reduces harmful emissions by maintaining proper sensor operation
• Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

When installing the Denso 234-4779 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 gender matches the vehicle harness for a secure fit. The 32.68 inch wiring harness length provides flexibility during installation, but routing should avoid excessive heat or moving parts. Follow vehicle-specific service manual instructions for torque specifications and sensor location.

Quality Assurance and Warranty

Denso manufactures this oxygen sensor to meet strict quality standards, ensuring reliable performance and durability. The OE Style line is designed to meet or exceed original equipment requirements. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to support long-term use in Mercury Quest and Nissan Villager vehicles.