Denso 234-4815 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4815

Denso 234-4815 is an OE Style heated oxygen sensor built for direct replacement service on select Chevrolet, GMC, Buick, Cadillac, Saturn, and Saab applications. It is designed for specific fitment, threaded mounting, and factory-style electrical connection for accurate installation on the listed upstream and downstream positions.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific-fit design for direct replacement on listed vehicles
• 4-wire configuration with female connector
• Threaded mounting with 0.708 in. thread diameter
• 12.24 in. wiring harness length for OE-style routing
• OE Style construction from Denso for factory-matched replacement service

OE Style Construction

Denso’s OE Style line is built to match original equipment dimensions and connection points, helping simplify replacement on vehicles such as the Chevrolet Equinox, GMC Terrain, and Buick LaCrosse. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent engine management performance and long service life. Part number 234-4815 is a direct-fit oxygen sensor for the listed applications.

This part cross-references Bosch 16070 and NTK 21556 for the same application.

Vehicle Fitment

• Fits 2013-2017 Chevrolet Equinox, Upstream
• Fits 2017 GMC Terrain, Downstream
• Fits 2012-2016 Buick LaCrosse, Upstream
• Fits 2014-2016 Cadillac ELR, Downstream
• Fits 2016 Cadillac SRX, Downstream
• Fits 2014-2016 Chevrolet Impala Limited, Upstream
• Fits 2012-2016 GMC Terrain, Upstream
• Fits 2012-2015 Cadillac SRX, Upstream
• Fits 2011-2015 Chevrolet Volt, Downstream
• Fits 2012-2013 Chevrolet Impala, Upstream
• Fits 2012 Chevrolet Captiva Sport, Upstream
• Fits 2010-2012 Chevrolet Equinox, Upstream
• Fits 2010-2012 Chevrolet Equinox, Downstream
• Fits 2009-2011 Buick Enclave, Upstream
• Fits 2010-2011 Buick LaCrosse, Upstream
• Fits 2010-2011 Buick LaCrosse, Downstream
• Fits 2005-2008 Buick LaCrosse, Downstream
• Fits 2010-2011 Cadillac SRX, Upstream
• Fits 2010-2011 Cadillac SRX, Downstream
• Fits 2009-2011 Chevrolet Traverse, Upstream
• Fits 2009-2011 GMC Acadia, Upstream
• Fits 2010-2011 GMC Terrain, Upstream
• Fits 2010-2011 GMC Terrain, Downstream
• Fits 2011 Saab 9-4X, Upstream
• Fits 2011 Saab 9-4X, Downstream
• Fits 2010 Buick Allure, Upstream
• Fits 2010 Buick Allure, Downstream
• Fits 2005-2008 Buick Allure, Downstream
• Fits 2009-2010 Saturn Outlook, Upstream
• Fits 2005-2006 Buick Rendezvous, Downstream

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Reduced fuel economy caused by slow or inaccurate sensor response
• Rough idle or drivability issues tied to exhaust feedback faults
• Failed emissions testing due to sensor-related trouble codes

Installation Notes

Verify the sensor position before ordering, since this part is listed for both upstream and downstream locations depending on the vehicle. Confirm the 4-wire female connector, threaded mounting, and harness length against the original sensor before installation. For best results, inspect the exhaust threads and wiring routing during replacement on Chevrolet Equinox, GMC Terrain, and Buick LaCrosse applications.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for direct replacement service. The OE Style design is intended to provide the correct fit and factory-style operation on the listed applications, including 2013-2017 Chevrolet Equinox and 2012-2016 GMC Terrain models.