Denso 234-4745 Oxygen Sensor - Downstream Left

Denso 234-4745 Oxygen Sensor for OE-Style Replacement

Denso 234-4745 is a heated oxygen sensor built to OE-style specifications for direct replacement on select Dodge applications. It is engineered for a specific fit and uses a 4-wire, female connector design with a threaded mounting style for accurate sensor replacement on the exhaust system.

Compatible with 2004 Dodge Dakota downstream left and 2004 Dodge Durango downstream left, this oxygen sensor supports precise exhaust feedback for vehicles that need a direct-fit replacement. The Denso OE Style line focuses on exact replacement dimensions and first-time fitment, helping simplify service on the Dakota and Durango.

Key Features

• Part number: 234-4745
• Heated oxygen sensor design
• Specific fit for direct replacement
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• Wiring harness length: 18.11 in.
• OE Style product line for factory-like fit and function

Product Details

Denso’s OE Style oxygen sensor line is manufactured and tested to OE standards, with precision-built components intended to match the original sensor location and connection style. The sensor includes Denso’s aluminum oxide trap layer, which helps protect the ceramic element from silicone and lead contamination for stable engine management performance and long service life. If you are replacing a downstream left oxygen sensor on a 2004 Dodge Dakota or 2004 Dodge Durango, Denso 234-4745 provides the correct fitment profile for that application.

This part cross-references Bosch 13687 and NTK 23556 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect exhaust oxygen readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate air-fuel feedback
• Slow sensor response from contamination or age
• Driveability concerns tied to faulty exhaust monitoring

Installation Notes and Tips

Verify the downstream left position before ordering and confirm connector style, wire count, and thread size against the original sensor. Inspect the harness routing and exhaust bung condition during replacement, and make sure the threaded mounting surface is clean before installation. Denso 234-4745 is a specific-fit sensor, so matching the vehicle application is important for proper installation on the Dakota or Durango.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for consistent fit and function. The OE Style line is built for direct replacement applications, with attention to connector design, sensor construction, and contamination resistance for dependable service.