Denso 234-4861 Oxygen Sensor - Downstream or Downstream Right

Denso OE Style Oxygen Sensor for Volvo

Denso Oxygen Sensor Part Number 234-4861 is an OE Style, specific-fit heated oxygen sensor built for direct replacement on select Volvo applications. It is engineered for downstream use on models such as the Volvo C30, C70, S40, S60, S80, V50, V70, XC70, and XC90, with exact-fit wiring and threaded mounting for a clean service replacement.

Denso’s OE Style line focuses on factory-style fit and sensor performance. This sensor uses a precision-built design, a 4-wire heated configuration, and Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and long service life.

Key Features

• OE Style specific-fit oxygen sensor for direct replacement
• Heated sensor design for faster operating temperature
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• Wiring harness length: 29.13 in.
• Built to strict OE standards for fit and function
• Part number 234-4861 for easy identification

Detailed Description

Denso 234-4861 is a downstream oxygen sensor designed for Volvo emissions control systems where accurate exhaust feedback is required. It is a specific-fit replacement for 2003-2013 Volvo applications, including 2007-2013 Volvo C30, 2006-2013 Volvo C70, 2004-2011 Volvo S40, 2005-2011 Volvo V50, 2005-2007 Volvo V70, 2005-2007 Volvo XC70, 2005-2006 Volvo S80, 2005-2006 Volvo XC90, 2005-2009 Volvo S60, 2012 Volvo S60, and 2003-2005 Volvo S80, downstream right. This part cross-references Bosch 16682 for the same application.

The OE Style construction is intended to match factory dimensions and connector layout, helping reduce installation issues and restore proper sensor response. If you are replacing a downstream oxygen sensor on a Volvo C30, Volvo S40, or Volvo XC90, Denso 234-4861 provides a direct-fit service part with the correct threaded mount and harness length.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Emissions test failures tied to sensor response issues
• Driveability concerns from contaminated or aging sensor elements

Installation Notes and Tips

Confirm the vehicle position before ordering, since this sensor is listed for downstream and downstream right applications only. Verify connector style, wire count, and thread diameter against the original sensor before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads for damage or corrosion before threading in the replacement.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for fit, response, and durability. The aluminum oxide trap layer adds protection against silicone and lead contamination, helping maintain sensor performance in demanding exhaust environments.