Denso 234-4494 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Ford F-150

Denso 234-4494 is a heated, specific-fit oxygen sensor built for downstream use on 2011-2014 Ford F-150 applications. It is engineered to match OE-style dimensions and connector requirements for a direct replacement on the Ford F-150 exhaust system.

Denso’s OE Style line focuses on exact replacement fitment and factory-style performance. This oxygen sensor uses a threaded mounting design, a female connector, 4-wire configuration, and a 15.55-inch wiring harness length to match the original installation layout.

Key Features

• Fits 2011-2014 Ford F-150, downstream
• Part number: 234-4494
• Heated oxygen sensor design for faster operating temperature
• Specific fit for direct replacement installation
• 4-wire, female connector configuration
• Threaded mounting type with 0.708-inch thread diameter
• 15.55-inch wiring harness length

Product Details

This Denso oxygen sensor is designed for downstream exhaust monitoring on the Ford F-150, where accurate exhaust feedback supports proper engine management and emissions control. The OE Style construction is intended to mirror the original sensor layout, helping maintain factory-style fitment and electrical connection on 2011-2014 Ford F-150 models. If you are replacing a worn downstream sensor on a Ford F-150, Denso 234-4494 provides the correct configuration for the application.

Denso’s sensor design includes an aluminum oxide trap layer that helps protect the ceramic element from silicone and lead contamination. That added protection supports long-term sensor stability and consistent exhaust signal performance in demanding driving conditions.

This part cross-references Ford BL3Z9G444A and Motorcraft DY1161 for the same application.

Common Issues This Part May Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect air-fuel feedback from a degraded exhaust sensor
• Reduced fuel economy caused by inaccurate sensor readings
• Emissions test failure tied to oxygen sensor performance
• Rough engine operation associated with faulty exhaust monitoring

Installation Notes and Tips

Verify downstream sensor location before installation and confirm connector style, wire count, and thread size match the original part. Inspect the exhaust bung threads and wiring routing before tightening the sensor to avoid cross-threading or harness strain. For best results, clear diagnostic trouble codes after installation and confirm the repair with a scan tool if available.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for precise replacement fitment and consistent performance. The OE Style line is built to deliver the correct part and fit for the application, with attention to factory-style dimensions and sensor durability.