Denso 234-5046 Air / Fuel Ratio Sensor - Downstream or Upstream

Denso OE Style Air/Fuel Ratio Sensor

The Denso 234-5046 is an OE Style heated air/fuel ratio sensor built for precise replacement and first-time fit. It is engineered for direct service on select Mercedes-Benz applications, including upstream and downstream positions where listed.

Compatible With Mercedes-Benz GL350, ML350, R350, and Sprinter 2500/3500 applications, this sensor supports accurate exhaust feedback for proper engine management. The Denso OE Style line focuses on exact replacement fitment and OE-level manufacturing consistency.

Key Features

• Heated air/fuel ratio sensor for faster operating response
• Specific fit design for direct replacement service
• 5-wire configuration with male connector
• Wiring harness length: 12.99
• Thread diameter: 0.711
• OE Style construction for Mercedes-Benz applications
• Part number: 234-5046

Detailed Description

Denso 234-5046 is manufactured and tested to OE standards for accurate signal delivery and dependable fitment. As part of the OE Style product line, it is built as a direct replacement sensor for vehicles that require a specific-fit heated air/fuel ratio sensor. This part cross-references Bosch 17200 for the same application.

Use this sensor on 2011-2015 Mercedes-Benz GL350, upstream; 2011-2014 Mercedes-Benz ML350, upstream; 2010-2013 Mercedes-Benz R350, upstream; 2011-2013 Mercedes-Benz R350, downstream; 2011 Mercedes-Benz GL350, downstream; 2011 Mercedes-Benz ML350, downstream; 2014-2015 Mercedes-Benz Sprinter 2500, upstream; and 2014-2015 Mercedes-Benz Sprinter 3500, upstream. The part number 234-5046 is also referenced in OE-style replacement searches for these Mercedes-Benz diesel and gasoline applications.

What This Sensor Helps Address

• Fault codes related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a slow or inconsistent sensor signal
• Check engine light concerns tied to upstream or downstream sensor readings
• Driveability problems linked to worn or aging oxygen sensor hardware

Installation Notes and Tips

Confirm the sensor position before ordering, since this application list includes both upstream and downstream locations. Match the connector style, wire count, and thread diameter to the original part before installation. For best results, inspect the harness routing and connector condition during replacement on Mercedes-Benz GL350, ML350, R350, and Sprinter models.

Quality Assurance

Denso manufactures this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and fit. The 234-5046 is built for direct service where a specific-fit heated air/fuel ratio sensor is required.