Denso 234-4659 Oxygen Sensor - Downstream

Denso 234-4659 Oxygen Sensor Overview

The Denso 234-4659 is a heated oxygen sensor built to OE-style specifications for direct replacement in select Honda and Acura applications. It is designed for downstream use and supports accurate exhaust monitoring for 1996-2001 Acura Integra, 1997-1998 Acura EL, and 1996-1998 Honda Civic models.

With a specific-fit design, 4-wire configuration, threaded mounting, and a male connector, this sensor is built for a first-time fit in the intended application. The Denso 234-4659 also uses a 12.99-inch wiring harness length and a 0.708-inch thread diameter for OE-style installation.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for direct replacement
• 4-wire construction with male connector
• Threaded mounting type with 0.708-inch thread diameter
• 12.99-inch wiring harness length
• OE Style Denso replacement for select Honda and Acura vehicles

OE Style Design and Application

Denso’s OE Style line focuses on exact replacement parts built and tested to OE standards. For this oxygen sensor, that means the sensing element, connector layout, and harness configuration are matched for the intended vehicle application. The result is a replacement that supports proper exhaust feedback on downstream systems in Acura Integra, Acura EL, and Honda Civic models.

This part cross-references Bosch 13074 and NTK 24546 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect downstream exhaust readings
• Reduced fuel control caused by aging sensor response
• Emissions test failures tied to sensor degradation
• Rough engine operation from inaccurate exhaust feedback

Installation Notes and Tips

Confirm downstream placement before installation and verify connector style, wire count, and thread size against the original sensor. The threaded mounting design is intended for direct replacement in the listed applications, including 1996-2001 Acura Integra, 1997-1998 Acura EL, and 1996-1998 Honda Civic. Inspect the harness routing and connector condition before final assembly.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards and uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination. That construction supports consistent sensor performance and long service life in the intended application.