Denso 234-4816 Oxygen Sensor - Downstream

Denso 234-4816 Oxygen Sensor Overview

Denso 234-4816 is an OE Style heated oxygen sensor built for specific-fit downstream applications. It is engineered for direct replacement on select Buick Enclave, Chevrolet Traverse, GMC Acadia, Saturn Outlook, and Cadillac models, with a threaded mounting design and a 4-wire female connector for a factory-style connection.

Denso’s OE Style line focuses on exact replacement fitment and sensor performance. This oxygen sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine operation and long service life.

Key Features

• OE Style replacement oxygen sensor for specific downstream applications
• Heated sensor design for faster operating temperature
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 20.59 in. wiring harness length for factory-style routing
• Built to OE standards for exact replacement fitment
• Cross-reference example: Bosch 16089

Detailed Product Description

This Denso oxygen sensor, part number 234-4816, is designed for downstream placement on select GM and Saturn vehicles. It is a direct-fit replacement for applications such as 2009-2011 Buick Enclave downstream, 2009-2011 Chevrolet Traverse downstream, 2009-2011 GMC Acadia downstream, and 2009-2010 Saturn Outlook downstream. It also fits 2004 Cadillac CTS downstream, 2004 Cadillac SRX downstream, and 2004 Cadillac XLR downstream, plus 2005 Cadillac XLR downstream with a 21 in. downstream sensor note. The OE Style construction helps maintain the original sensor layout and connection style for straightforward service replacement.

Common Problems This Sensor Can Help Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Slow sensor response from contamination or age
• Exhaust emissions issues tied to a failing oxygen sensor

Installation Notes and Tips

Verify downstream location, connector style, thread size, and harness length before installation. This is a specific-fit sensor, so confirm the vehicle year, make, model, and downstream position against the listed applications before ordering. Use proper oxygen sensor service tools and inspect the exhaust bung threads and wiring routing during replacement. For fitment-based searches, this part is commonly selected for 2009-2011 Buick Enclave downstream, 2009-2011 Chevrolet Traverse downstream, and 2009-2011 GMC Acadia downstream service.

Quality Assurance

Denso manufactures and tests this sensor to OE standards for replacement accuracy and consistent performance. The OE Style product line is built for first-time fitment and uses contamination-resistant sensor protection to support durability in demanding exhaust environments. Part number 234-4816 is also a direct reference for shoppers comparing Denso 234-4816 against other OE-style downstream oxygen sensor listings.