Denso 234-4550 Oxygen Sensor - Downstream

Denso 234-4550 Oxygen Sensor for Hyundai Elantra

Denso 234-4550 is an OE Style heated oxygen sensor built for specific-fit replacement on select Hyundai applications. It is engineered for the downstream position on 2011-2014 Hyundai Elantra, 2013-2014 Hyundai Elantra Coupe, and 2013-2014 Hyundai Elantra GT, excluding California models.

Key Features

• OE Style replacement oxygen sensor for precise fitment
• Heated sensor design with 4-wire configuration
• Specific-fit application for downstream installation
• Female connector with threaded mounting type
• Wiring harness length: 29.09
• Thread diameter: 0.708

OE Style Construction

Denso’s OE Style line is built to match original equipment requirements for fit and function. The 234-4550 oxygen sensor is precision manufactured and tested to OE standards, with a design focused on first-time fit and dependable signal performance. Denso also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent engine management and long service life.

This part cross-references Hyundai (e.g., 392102E500) for the same application.

What This Oxygen Sensor Helps 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
• Emissions test failures tied to sensor response issues
• Slow or inconsistent sensor output on Hyundai Elantra, Elantra Coupe, and Elantra GT models

Installation Notes

Verify the downstream location and confirm the vehicle is not a California-emissions application before ordering. Match the connector style, wire count, and threaded mounting dimensions to the original sensor. For best results, inspect the harness routing and exhaust threads before installation on compatible Hyundai Elantra, Elantra Coupe, and Elantra GT vehicles.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests each component for replacement accuracy and fit. The OE Style design is intended to deliver the correct part and the correct fit for the listed Hyundai applications.