Denso 234-5057 Air / Fuel Ratio Sensor - Upstream

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-5057 is designed specifically for select Land Rover models, including the LR2, Range Rover, Range Rover Evoque, and Range Rover Sport. This heated sensor ensures accurate air and fuel mixture readings to support optimal engine performance and emissions control.

• Heated sensor type for faster response times
• Specific fit for Land Rover LR2, Range Rover, Range Rover Evoque, and Range Rover Sport
• 15.16-inch wiring harness length for precise installation
• Five-wire configuration with male connector
• Thread diameter of 0.711 inches for secure mounting
• Regular grade type for reliable operation

Detailed Product Description

The Denso 234-5057 air/fuel ratio sensor is engineered to provide accurate oxygen level readings in the exhaust system, enabling the engine control unit to adjust fuel delivery efficiently. This heated sensor type accelerates the sensor’s warm-up time, improving emissions control during cold starts. The 15.16-inch wiring harness length and five-wire setup with a male connector ensure compatibility and ease of connection with the vehicle’s existing wiring harness. The thread diameter of 0.711 inches allows for a secure and proper fit in the exhaust manifold or pipe.

This sensor is a specific fit for Land Rover vehicles, including the LR2, Range Rover, Range Rover Evoque, and Range Rover Sport, ensuring proper integration with the vehicle’s emission control system. The regular grade type indicates standard OEM quality suitable for everyday driving conditions.

About the OE Style Product Line

The Denso OE Style product line focuses on delivering parts that meet original equipment specifications for fit, form, and function. The OE Style air/fuel ratio sensor 234-5057 is designed to match the performance and durability of the factory-installed sensor, providing a direct replacement that supports the vehicle’s emission standards and engine management system.

Common Applications and Issues Addressed

• Helps resolve rough idling caused by incorrect air/fuel mixture
• Reduces engine hesitation and stalling related to faulty oxygen sensor readings
• Improves fuel efficiency by providing accurate sensor data to the ECU
• Assists in passing emissions tests by maintaining proper exhaust gas composition
• Prevents check engine light triggers related to air/fuel ratio sensor faults

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate tools to avoid damaging the sensor or wiring harness
• Verify the connector gender and wire count match the vehicle’s harness
• Apply anti-seize compound on the sensor threads if recommended by the manufacturer
• Clear any diagnostic trouble codes after installation to reset the ECU

Quality Assurance and Warranty

Denso’s OE Style air/fuel ratio sensor 234-5057 is manufactured to meet OEM standards for quality and reliability. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to ensure long-term performance in Land Rover LR2, Range Rover, Range Rover Evoque, and Range Rover Sport vehicles.