Denso 234-4220 Oxygen Sensor - Downstream

OE-Style Oxygen Sensor for Honda and Acura

Denso 234-4220 is a heated, specific-fit oxygen sensor built for direct replacement in select 2004-2005 Acura EL and 2004-2005 Honda Civic downstream applications. It is engineered to match OE-style fitment and connector layout for a straightforward repair on the correct vehicle and position.

For drivers searching for a downstream oxygen sensor for 2004-2005 Honda Civic or 2004-2005 Acura EL, this Denso OE Style part number 234-4220 is built around exact replacement requirements and first-time fitment.

Key Features

• Specific-fit heated oxygen sensor for downstream placement
• OE Style design for direct replacement applications
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 14.96 in. wiring harness length
• Built to OE standards for accurate sensor replacement

Product Details

Denso 234-4220 is part of Denso’s OE Style line, which focuses on replacement sensors that follow original equipment dimensions and connection points. The sensor uses a heated design and a specific-fit configuration, helping ensure the correct downstream installation on the listed Acura and Honda applications. Denso also incorporates an aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting stable engine management performance and fuel economy over time.

This part cross-references Bosch 13534 and NTK 24242 for the same application. It is a direct-fit oxygen sensor for 2004-2005 Honda Civic, downstream, and 2004-2005 Acura EL, downstream.

Common Issues This Part May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Slow sensor response or aging sensor signal output
• Failed emissions inspection tied to oxygen sensor faults

Installation Notes and Tips

Confirm the downstream position before ordering and match the connector, wire count, and threaded mounting style to the original sensor. Inspect the harness routing and connector condition during installation, and verify there are no exhaust leaks near the sensor location that could affect readings. Use the vehicle’s service information for torque and diagnostic procedures.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality and proper fit on the listed applications. The OE Style product line is designed to deliver the correct part and fit for the specified Honda Civic and Acura EL downstream applications.