Denso 234-4797 Oxygen Sensor - Downstream

Denso 234-4797 Oxygen Sensor Overview

Denso 234-4797 is an OE Style heated oxygen sensor built for direct replacement in specific downstream applications. It is engineered for 2004-2008 Acura TSX and 2003-2007 Honda Accord models, with a threaded mounting design and a 4-wire female connector for a precise factory-style match.

Denso manufactures and tests this oxygen sensor to OE standards, with attention to exact fit and consistent signal performance. The OE Style line is built around first-time fitment and includes Denso’s aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination.

Key Features

• OE Style replacement oxygen sensor for specific downstream applications
• Heated sensor design for faster operating temperature and stable feedback
• Specific fit for direct installation on listed Acura and Honda vehicles
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• Wiring harness length: 42.13 in.

Detailed Product Description

This Denso oxygen sensor, part number 234-4797, is designed for downstream use on the 2004-2008 Acura TSX and 2003-2007 Honda Accord. It is a direct-fit emission control sensor intended to restore accurate exhaust oxygen feedback for the engine management system. The heated design helps the sensor reach operating temperature quickly, supporting consistent closed-loop operation after startup.

The OE Style construction focuses on exact replacement dimensions and connector layout, which helps simplify fitment on the Acura TSX and Honda Accord applications listed above. Denso’s protective aluminum oxide trap layer is used to shield the ceramic sensing element from contamination that can affect sensor response and durability.

This part cross-references Bosch 13704 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response after startup
• Emission test failures tied to sensor degradation

Installation Notes and Tips

Verify downstream location before installation and confirm connector style, thread diameter, and harness length against the original sensor. Use proper oxygen sensor service tools to avoid damaging the threaded mounting area, and inspect the harness routing so the lead is kept clear of hot exhaust components.

For best results, compare the original part number and vehicle application before ordering. This Denso 234-4797 is a specific-fit sensor for the listed Acura TSX and Honda Accord applications, not a universal replacement.

Quality Assurance

Denso builds this OE Style oxygen sensor to strict original-equipment standards and tests it for replacement accuracy and fit consistency. The design is intended to deliver the right part and the right fit for the listed applications.