Denso 234-4029 Oxygen Sensor - Downstream, Downstream Front or Downstream Right

Denso OE Style Oxygen Sensor 234-4029

Denso 234-4029 is an OE-style heated oxygen sensor built for specific-fit replacement on select Dodge Ram and Jeep applications. It is engineered to match factory-style fitment and signal performance for downstream monitoring, with a threaded mounting design and a female 4-wire connector.

Key Features

• OE Style replacement oxygen sensor for direct-fit service
• Heated sensor design for faster operating response
• Specific fit application for accurate installation
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 thread diameter
• 18.70 wiring harness length for factory-style routing
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

This Denso oxygen sensor is manufactured and tested to OE standards for exact replacement fitment and consistent operation. The OE Style line is built for first-time fit and factory-style integration, making it a practical choice for downstream sensor replacement on 2001-2003 Dodge Ram 1500, Ram 1500 Van, Ram 2500 Van, Ram 3500 Van, Jeep Grand Cherokee, and Jeep Liberty applications. The part number 234-4029 is also cross-referenced with Bosch 13672 for the same application.

By using a heated sensor and a specific-fit design, this Denso 234-4029 helps maintain proper exhaust feedback to the engine control system. That supports accurate air-fuel management, stable drivability, and efficient operation in vehicles that rely on downstream oxygen sensor input.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect downstream exhaust feedback readings
• Rough idle or inconsistent fuel control caused by sensor degradation
• Reduced fuel economy from an aging or contaminated sensor
• Factory-fit replacement needs on Dodge Ram and Jeep models

Installation Notes

Fits 2001-2003 Dodge Ram 1500, downstream; 2001-2003 Dodge Ram 1500 Van, downstream; 2001-2003 Dodge Ram 2500 Van, downstream; 2001-2003 Dodge Ram 3500 Van, downstream; 2001-2003 Jeep Grand Cherokee, downstream front; and 2002-2003 Jeep Liberty, downstream right. Additional coverage includes 2002 Dodge Ram 1500, downstream, excluding California; 2001-2002 Dodge Ram 1500 Van, downstream, excluding California; 2001-2002 Dodge Ram 2500, downstream; 2002 Dodge Ram 2500, downstream, excluding California; 2001-2002 Dodge Ram 2500 Van, downstream, excluding California; 2002 Dodge Ram 3500, downstream; 2001-2002 Dodge Ram 3500, downstream, excluding California; and 2001-2002 Dodge Ram 3500 Van, downstream, excluding California.

Confirm connector style, wire count, and mounting thread before installation. Route the harness to match the original sensor path and avoid contact with hot exhaust components. This part number 234-4029 is designed for specific applications, so verify the vehicle year, model, and sensor position before ordering.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each component for replacement accuracy and fit. The aluminum oxide trap layer adds protection for the sensing element, supporting long-term sensor durability in demanding exhaust environments.