Denso 234-4374 Oxygen Sensor - Upstream or Upstream Right

Reliable Oxygen Sensor for Ford, Lincoln, Mazda, and Mercury Vehicles

The Denso OE Style Oxygen Sensor 234-4374 is designed to provide precise emissions control for specific Ford, Lincoln, Mazda, and Mercury models. This heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and reduce harmful emissions.

• Heated sensor type for faster response times
• Specific fit for select Ford, Lincoln, Mazda, and Mercury vehicles
• 15.39-inch wiring harness length for proper installation
• Four-wire design with male connector for secure connection
• Threaded mounting type with 0.708-inch thread diameter

About the Denso OE Style Product Line

The OE Style line from Denso offers oxygen sensors engineered to meet original equipment specifications. This ensures compatibility and reliable performance for vehicles requiring precise emissions control components. The 234-4374 oxygen sensor maintains factory standards for fit, form, and function, making it a suitable replacement part for the listed vehicle applications.

Detailed Product Description

The Denso 234-4374 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start. Its four-wire configuration includes a male connector designed for a secure and reliable electrical connection. The 15.39-inch wiring harness length provides adequate reach for installation in the engine bay, while the threaded mounting type with a 0.708-inch diameter ensures a proper and secure fit. This sensor is specifically designed for compatibility with Ford E-150, E-150 Club Wagon, E-250, E-350 Club Wagon, E-350 Super Duty, Escape, F-250 Super Duty, F-350 Super Duty, Fusion, Mariner, Milan, Tribute, and Zephyr models, as well as Lincoln, Mazda, and Mercury vehicles within these model lines.

Common Applications and Issues Addressed

• Helps correct engine misfires caused by faulty oxygen sensors
• Improves fuel economy by providing accurate air-fuel ratio data
• Reduces vehicle emissions to meet regulatory standards
• Prevents check engine light triggers related to oxygen sensor faults
• Supports smooth engine idling and acceleration performance

Installation Notes and Tips

When installing the Denso 234-4374 oxygen sensor, ensure the engine is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the wiring harness length and connector gender match the vehicle’s factory harness. Tighten the sensor to the manufacturer’s torque specifications to prevent leaks or sensor damage. It is recommended to clear any diagnostic trouble codes after installation to reset the vehicle’s engine control unit.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. This ensures reliable performance and durability under normal operating conditions. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.