Denso 234-4654 Oxygen Sensor - Upstream or Upstream Left

Denso OE Style Oxygen Sensor 234-4654

Denso 234-4654 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for specific applications on Jeep Grand Cherokee, Dodge Dakota, Dodge Durango, and Dodge Ram 1500 models listed below.

The OE Style line focuses on direct-fit replacement with the correct connector, thread size, and harness length for the application. Denso also uses an aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting stable engine operation and fuel control.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• Wiring harness length: 14.57 in.
• OE Style construction for application-matched fitment
• Cross-reference example: Bosch 13937

Detailed Product Information

This Denso oxygen sensor is designed for upstream locations and upstream left placement where listed. It is a direct-fit emission control sensor for 2001-2004 Jeep Grand Cherokee, 2001-2002 Dodge Dakota, 2001-2002 Dodge Durango, and 2001-2002 Dodge Ram 1500 applications. The part number 234-4654 is built to match the original sensor layout, helping maintain accurate exhaust feedback for the engine control system.

As part of Denso’s OE Style line, this sensor is manufactured and tested to OE-level standards for dimensional accuracy and dependable electrical performance. The sensor’s protective trap layer is intended to help resist contamination that can shorten sensor life and affect drivability.

What This Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel mixture feedback from a worn upstream sensor
• Reduced fuel economy caused by slow or inaccurate exhaust readings
• Rough idle or hesitation tied to faulty sensor input
• Emission control faults on Jeep Grand Cherokee, Dodge Dakota, Dodge Durango, and Dodge Ram 1500 applications

Installation Notes and Tips

• Verify the vehicle position before ordering: upstream left or upstream, depending on application.
• Confirm the connector style, wire count, and thread diameter match the original sensor.
• Inspect the exhaust bung threads before installation to ensure proper seating.
• Use the listed fitment only; this is a specific-fit sensor, not a universal part.
• For 2002 Dodge Ram 1500, note the listed California and non-California application details.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each component for replacement accuracy and fit. The design is focused on reliable sensor response, contamination resistance, and consistent performance in the specified applications.