Denso 234-4456 Oxygen Sensor - Downstream or Downstream Left

Denso OE Style Oxygen Sensor 234-4456

Denso 234-4456 is an OE-style heated oxygen sensor built for specific applications that require a direct replacement with the correct connector, thread size, and harness length. It is engineered for downstream use on select Hyundai and Kia models, including Hyundai Santa Fe, Santa Fe XL, Genesis, and Kia Sorento.

Key Features

• Heated oxygen sensor with specific fitment for direct replacement
• OE Style design for factory-like sensor placement and connection
• 11.61 in. wiring harness length
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• Built for downstream left and downstream positions on listed vehicles

OE Style Construction

Denso’s OE Style line is built and tested to OE-level standards for accurate replacement fitment and consistent operation. This sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management performance and long service life. Part number 234-4456 is a direct-fit option for drivers servicing emissions-related sensor faults on select Hyundai and Kia platforms.

This part cross-references Bosch (e.g., 18045, 18105) for the same application.

Vehicle Fitment

• Fits 2013-2019 Hyundai Santa Fe XL, downstream left.
• Fits 2010-2018 Hyundai Santa Fe, downstream left.
• Fits 2011-2018 Kia Sorento, downstream left.
• Fits 2012-2017 Hyundai Azera, downstream left.
• Fits 2015-2017 Kia K900, downstream.
• Fits 2012-2016 Hyundai Genesis, downstream.
• Fits 2013-2016 Hyundai Genesis Coupe, downstream.
• Fits 2014-2016 Kia Cadenza, downstream left.
• Fits 2015 Kia Sedona, downstream left, to 01/26/2015.
• Fits 2014 Kia Sedona, downstream left.
• Fits 2011-2012 Kia Sedona, downstream left.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust monitoring
• Emissions test failure tied to sensor response or contamination
• Rougher engine operation when the ECU receives unreliable exhaust data

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and mounting position before installation. This Denso oxygen sensor is specific fit, so match the vehicle application and downstream left or downstream location exactly. Inspect the harness routing and exhaust threads during replacement to help ensure proper seating and signal performance.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for exact replacement fitment and dependable operation. The OE Style design and contamination-resistant element protection support consistent performance in emissions control service.