Denso 234-4355 Oxygen Sensor - Downstream or Downstream Front

Denso OE Style Oxygen Sensor 234-4355

Denso 234-4355 is a specific-fit heated oxygen sensor built to OE-style dimensions and electrical requirements for direct replacement service. It is designed for downstream front applications on select Honda, Acura, and related models, including Honda Odyssey, Pilot, Ridgeline, and Accord.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct replacement on listed applications
• 4-wire configuration with male connector
• Threaded mounting with 0.708 in. thread diameter
• 16.73 in. wiring harness length for OE-style routing
• Denso OE Style construction for exact replacement fit

OE Style Construction

Denso’s OE Style line is built and tested to OE standards, with precision manufacturing aimed at first-time fit and consistent sensor performance. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and fuel economy on vehicles that rely on accurate exhaust feedback. This part number, 234-4355, is a direct replacement choice for downstream front oxygen sensor service on applications such as Honda Odyssey, Honda Pilot, and Acura RL.

What This Sensor Helps Address

• Check engine light caused by oxygen sensor fault codes
• Rough idle or drivability issues related to exhaust feedback errors
• Reduced fuel economy from inaccurate air-fuel mixture correction
• Slow sensor response or heater circuit-related failures
• Emissions test failures tied to a worn downstream oxygen sensor

Installation Notes

Verify the connector style, wire count, thread diameter, and mounting location before installation. This sensor is listed for downstream front positions on select 2003-2010 Honda and Acura vehicles, including 2005-2010 Honda Odyssey, 2005-2008 Honda Pilot, and 2003-2007 Honda Accord. Confirm the exact application by year, model, and position before ordering. This part cross-references Bosch (e.g., 13256, 13853) for the same application.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for fit and performance consistency. The OE-style design and contamination-resistant trap layer support dependable service life in demanding exhaust environments.