Denso 234-4546 Oxygen Sensor - Downstream Right

Denso OE Style Oxygen Sensor 234-4546

Denso 234-4546 is an OE-style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for the downstream right position on select 2011 Ram 2500 and Ram 3500 applications, with the connector, thread size, and harness length matched for direct service replacement.

The Denso OE Style line focuses on factory-style fit and sensor performance. This oxygen sensor uses a precision-built design and Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine operation and fuel control.

Key Features

• OE-style heated oxygen sensor for direct replacement service
• Specific fit for the downstream right location
• 4-wire design with female connector
• Threaded mounting type with 0.708 in. thread diameter
• Wiring harness length: 13.98 in.
• Built to strict OE standards for fit and function
• Part number: 234-4546

Detailed Description

This Denso oxygen sensor is made for drivers and technicians replacing a failed downstream right sensor on 2011 Ram 2500 and Ram 3500 models. As an OE-style replacement, Denso 234-4546 is built to match the original sensor layout and connection style, helping restore accurate exhaust monitoring and proper fuel management. This part cross-references Bosch 15511 for the same application.

Compatible With 2011 Ram 2500, downstream right, and 2011 Ram 3500, downstream right. The specific-fit design helps reduce guesswork during replacement, while the heated sensor construction supports quicker operating temperature and consistent signal response. For Ram 2500 and Ram 3500 owners searching for a downstream right oxygen sensor replacement, 234-4546 provides a direct-fit service option.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel economy from a failing downstream sensor
• Slow or inconsistent exhaust feedback to the engine control system
• Sensor contamination from silicone or lead exposure

Installation Notes and Tips

Verify the downstream right location before installation and confirm connector style, thread diameter, and harness length against the original sensor. Because this is a threaded, specific-fit sensor, proper removal and installation tools help prevent damage to the exhaust bung and wiring. Always compare the old unit to Denso 234-4546 before final installation on Ram 2500 and Ram 3500 vehicles.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to strict original-equipment standards. The precision-built design is intended to deliver accurate replacement fitment and dependable sensor performance for the listed Ram applications.