Denso 234-4780 Oxygen Sensor - Upstream

OE-Style Upstream Oxygen Sensor

Denso 234-4780 is a specific-fit, heated oxygen sensor built for OE-style replacement on select Chevrolet, Buick, and GMC applications. It uses a 4-wire, male-connector design with a threaded mounting style and a 17.13-inch wiring harness length for direct replacement service.

For drivers searching for an upstream oxygen sensor for 2014-2016 Chevrolet Sonic, 2014-2015 Chevrolet Trax, or 2014-2015 Buick Encore, this Denso part number 234-4780 is built to match the original sensor layout and connection style.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for OE-style replacement
• 4-wire configuration with male connector
• Threaded mounting type with 0.708-inch thread diameter
• 17.13-inch wiring harness length
• Built to OE standards for exact replacement fit
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso OE Style oxygen sensors are manufactured and tested to strict OE standards, with precision-built components intended to match the original sensor location and electrical connection. The 234-4780 is an upstream sensor for 2014-2016 Chevrolet Sonic, 2014-2015 Buick Encore, and 2014-2015 Chevrolet Trax, with additional 2013 OE-style applications noted for the Sonic, Encore, and Trax. This part cross-references Bosch 16752 for the same application.

The OE Style line focuses on first-time fit and consistent sensor performance. Denso’s protective trap layer is designed to help shield the sensing element from contamination that can affect engine operation and fuel economy.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a failing upstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Rough idle or drivability concerns tied to sensor degradation
• Slow sensor response from contamination or age-related wear

Installation Notes and Tips

Confirm the upstream sensor location and connector style before installation. Match the 4-wire, male-connector configuration and verify the threaded mounting dimensions against the original part. On 2013 Chevrolet Sonic, 2013 Chevrolet Trax, and 2013 Buick Encore applications, note the OE-style second-design and grey-sleeve fitment details listed in the catalog data.

For best results, inspect the exhaust threads and wiring routing before installing Denso 234-4780. Proper sensor placement and secure connector engagement are important for accurate exhaust feedback.

Quality Assurance

Denso manufactures this oxygen sensor to OE standards and tests it for replacement accuracy and fit consistency. The OE Style design is intended to deliver the correct part and the correct fit for the listed Chevrolet Sonic, Buick Encore, and Chevrolet Trax applications.