Denso 234-4552 Oxygen Sensor - Downstream or Upstream Rear

Denso OE Style Oxygen Sensor 234-4552

Denso 234-4552 is an OE Style heated oxygen sensor built for direct replacement on select Hyundai and Kia applications. It is engineered for a specific fit, with a threaded mounting design and a 4-wire male connector for straightforward replacement on the listed vehicles.

For drivers searching for a Hyundai Elantra downstream oxygen sensor, Kia Forte upstream rear oxygen sensor, or a direct-fit replacement for a Hyundai Tucson or Kia Seltos, this Denso sensor is built to match the original application. The 24.37-inch wiring harness length supports proper routing, while the OE-style construction helps maintain accurate exhaust feedback.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Hyundai and Kia applications
• Threaded mounting type for OE-style installation
• 4-wire male connector for factory-style electrical connection
• 24.37-inch wiring harness length
• Thread diameter: 0.708 in.

OE Style Construction

Denso builds this oxygen sensor to OE standards for exact replacement fitment and consistent performance. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting long-term durability and stable engine management. This part cross-references Bosch (e.g., 16150, 16185) for the same application.

Vehicle Fitment

• Fits 2019-2024 Kia Forte, downstream
• Fits 2021-2024 Kia Seltos, upstream
• Fits 2018-2021 Hyundai Kona, upstream
• Fits 2018-2021 Hyundai Tucson, downstream
• Fits 2017-2020 Kia Optima, downstream
• Fits 2019 Hyundai Sonata, downstream
• Fits 2016-2017 Hyundai Sonata, downstream
• Fits 2015-2016 Hyundai Elantra, downstream
• Fits 2014-2016 Kia Forte, upstream rear
• Fits 2014-2016 Kia Forte Koup, upstream rear
• Fits 2014-2016 Kia Forte5, upstream rear
• Fits 2011-2014 Hyundai Elantra, downstream
• Fits 2013-2014 Hyundai Elantra Coupe, downstream
• Fits 2013-2014 Hyundai Elantra GT, downstream

Common Uses

• Replacing a failed Hyundai Elantra downstream oxygen sensor
• Restoring proper exhaust feedback on a Kia Forte or Forte5
• Addressing check engine light concerns tied to oxygen sensor faults
• Correcting fuel trim and drivability issues caused by a worn sensor
• Maintaining emissions system performance on listed Hyundai and Kia models

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for downstream, upstream, and upstream rear locations depending on the vehicle. Match the connector style, wire count, and thread diameter to the original sensor before installation. For best results, verify the application against the vehicle’s engine and emissions configuration, especially on 2011-2014 Hyundai Elantra and related models.

Quality Assurance

Denso manufactures and tests 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 and Kia applications, including the Denso 234-4552 replacement path for select Elantra, Forte, Tucson, Sonata, Kona, Optima, and Seltos models.