Denso 234-4979 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Acura and Honda Vehicles

The Denso OE Style Oxygen Sensor 234-4979 is designed specifically for select Acura and Honda models, including the Civic, HR-V, and ILX. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

• Heated sensor type for faster response times
• Specific fit for Acura Civic, HR-V, and Honda ILX models
• Wiring harness length of 8.66 inches for proper installation
• Four-wire configuration for reliable signal transmission
• Part number 234-4979 for exact replacement compatibility

About the Denso OE Style Product Line

The OE Style line from Denso offers direct-fit replacement parts engineered to meet original equipment specifications. This oxygen sensor maintains factory-level performance and durability, ensuring seamless integration with your vehicle’s emission control system. The OE Style designation indicates that this sensor matches the original sensor’s design and function, providing a dependable solution for maintaining emissions compliance.

Product Details and Specifications

This Denso oxygen sensor features a heated element that accelerates sensor activation, reducing warm-up time and improving engine efficiency. The sensor’s four-wire design includes two wires for the heating element and two for the sensor signal, supporting accurate and stable readings. With a wiring harness length of 8.66 inches, it fits precisely in the designated mounting location without excess slack or tension. The sensor is a specific fit for Acura and Honda vehicles, ensuring compatibility with the Civic, HR-V, and ILX models.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio monitoring for improved fuel economy
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring accurate sensor readings
• Prevents engine performance issues caused by faulty oxygen sensors
• Supports smooth engine idling and acceleration response

Installation Notes and Tips

When installing the Denso 234-4979 oxygen sensor, ensure the vehicle is cool to avoid burns. Disconnect the battery before removal to prevent electrical shorts. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the original sensor to avoid installation issues. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation.

Quality Assurance and Warranty

Denso manufactures this oxygen sensor to meet strict quality standards, ensuring reliable performance and durability. The OE Style 234-4979 sensor is engineered to match original equipment specifications for consistent operation. While specific warranty details are not provided here, Denso products typically come with manufacturer-backed warranties to protect against defects in materials and workmanship.