Denso 234-4095 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-4095

Denso 234-4095 is a heated, specific-fit oxygen sensor built for direct replacement in select Honda, Acura, and Isuzu applications. It is engineered to match OE-style fit and electrical connection requirements for accurate exhaust feedback and dependable drivability.

The OE Style line focuses on first-time fit and consistent replacement performance. Denso uses a precision-built design with an aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting stable engine operation and fuel control over time.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct replacement
• 4-wire configuration with male connector
• Threaded mounting with 0.708 in. thread diameter
• Wiring harness length: 9.25 in.
• OE Style construction for factory-style fit and function

Detailed Product Overview

This Denso oxygen sensor, part number 234-4095, is designed for upstream exhaust locations on select vehicles including the Honda Accord, Honda Prelude, Honda Odyssey, Acura CL, and Isuzu Oasis. It is a direct-fit replacement for applications that require a heated, threaded sensor with a male connector and 4-wire layout. This part cross-references Bosch 13007 for the same application.

As part of Denso’s OE Style line, the sensor is built to match original equipment standards for fit and electrical performance. The protective trap layer helps shield the ceramic sensing element from contamination, which supports more consistent air-fuel feedback and long-term reliability in emissions control systems.

Vehicle Fitment

• Fits 1997-1999 Acura CL, Upstream, OE Style
• Fits 1996-1999 Isuzu Oasis, Upstream, OE Style
• Fits 1995-1998 Honda Odyssey, Upstream, OE Style
• Fits 1996-1997 Honda Accord, Upstream, OE Style
• Fits 1996 Honda Prelude, Upstream, OE Style
• Fits 1990-1991 Honda Prelude, Upstream, OE Style
• Fits 1990-1995 Honda Accord, Upstream, Male Connector; OE Style

Common Issues This Part Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture feedback
• Reduced fuel economy from a worn upstream sensor
• Rough idle or hesitation caused by slow sensor response
• Emissions test failure tied to sensor degradation

Installation Notes and Tips

Confirm the connector style, wire count, and upstream location before installation. This sensor uses a threaded mounting design and a specific-fit configuration, so it should be matched to the exact vehicle application listed above. Inspect the harness routing and exhaust threads during replacement to ensure proper seating and connection.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to original-equipment standards for fit, function, and durability. The design is intended to deliver accurate replacement performance for the listed Honda, Acura, and Isuzu applications.