Denso 234-4903 Oxygen Sensor - Upstream Right

Denso OE Style Oxygen Sensor 234-4903

Denso 234-4903 is an OE-style heated oxygen sensor built for exact replacement on select Hyundai applications. It is engineered for the upstream right position on 2007-2012 Hyundai Veracruz and 2007-2009 Hyundai Santa Fe, with a specific-fit design for straightforward matching to the original sensor location.

For drivers searching for a Hyundai Veracruz upstream right oxygen sensor or a Hyundai Santa Fe upstream right O2 sensor, this Denso part number 234-4903 follows OE-style dimensions and connector layout for a direct-fit replacement.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Hyundai applications
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 14.29 in. wiring harness length
• OE Style replacement from Denso

Product Details

Denso 234-4903 is manufactured and tested to OE standards for accurate replacement fitment and consistent sensor performance. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and fuel economy over time. This part cross-references Hyundai 392103C300 for the same application.

Compatible With 2007-2012 Hyundai Veracruz, upstream right, and 2007-2009 Hyundai Santa Fe, upstream right. The Denso 234-4903 oxygen sensor is a practical choice when replacing a worn or slow-responding upstream sensor on these vehicles.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel economy from a failing upstream sensor
• Slow sensor response during closed-loop operation
• Emissions test failure caused by sensor degradation

Installation Notes and Tips

Verify the upstream right position before ordering and match the connector, wire count, and threaded mounting style to the original sensor. Inspect the harness routing and connector condition during replacement, and confirm the sensor threads seat cleanly in the exhaust bung before final tightening.

Quality Assurance

Denso builds this OE Style oxygen sensor to strict original-equipment standards for fit and function. The precision-built design supports first-time fitment on the listed Hyundai Veracruz and Hyundai Santa Fe applications.