Denso 234-5724 Air / Fuel Ratio Sensor - Upstream

Denso OE-Style Air/Fuel Ratio Sensor

Denso 234-5724 is a specific-fit, wide-band air/fuel ratio sensor built for direct replacement on select Honda applications. It is engineered to match OE-style fit and signal requirements for accurate exhaust feedback and dependable drivability.

For drivers searching for a Honda Civic upstream air/fuel ratio sensor or a Honda CR-V upstream replacement sensor, this Denso part number 234-5724 provides a direct-fit solution with the correct harness length and 5-wire configuration.

Key Features

• Wide-band air/fuel ratio sensor for precise exhaust monitoring
• Specific fit for direct replacement on listed Honda applications
• 5-wire design with 12.80 in. wiring harness length
• Standard replacement grade for OE-style service
• Built and tested to OE standards for consistent performance
• Cross-reference: Honda 365315K8004 and NTK 27033

Product Details

Denso’s Air / Fuel Ratio Sensor - OE Style line focuses on exact replacement parts that match factory fitment and electrical requirements. Part number 234-5724 is designed for upstream placement and is listed for 2016-2021 Honda Civic and 2017-2022 Honda CR-V applications. If you need a Honda Civic upstream air/fuel ratio sensor or a Honda CR-V OE-style replacement sensor, this unit is built for the application-specific fit expected in emission control service.

The sensor’s wide-band design supports accurate air/fuel monitoring, while the OE-style construction helps ensure the connector, harness length, and mounting style align with the original part. Denso 234-5724 is a practical choice for restoring proper sensor response on vehicles that require a direct-fit upstream sensor.

Common Issues This Sensor Can Address

• Check engine light related to air/fuel ratio sensor performance
• Incorrect upstream sensor readings affecting fuel control
• Rough idle or hesitation caused by inaccurate exhaust feedback
• Failed emissions inspection tied to sensor malfunction
• Hard starting or drivability concerns linked to sensor degradation

Installation Notes and Tips

Verify the vehicle’s year, model, and upstream sensor location before installation. This part is a specific-fit replacement, so connector style, harness length, and mounting position should be matched to the original sensor. For best results, inspect the wiring and exhaust threads before installation and clear diagnostic trouble codes after the repair is complete.

Quality Assurance

Denso manufactures and tests this sensor to OE standards for replacement accuracy and first-time fit. The Air / Fuel Ratio Sensor - OE Style product line is intended to deliver the correct part and fit for the listed Honda Civic and Honda CR-V applications.