Dorman 904-6003 NOx Sensor for Diesel Particulate Filter Inlet

The Dorman 904-6003 is a direct-replacement nitrogen oxide (NOx) sensor designed for installation at the inlet of the diesel particulate filter (DPF). This sensor plays a critical role in diesel emissions systems by monitoring NOx levels in the exhaust stream, allowing the engine control module to optimize diesel exhaust fluid (DEF) injection and ensure compliance with emissions regulations.

Key Features:

• Direct-fit replacement for original equipment on select diesel vehicles
• Monitors nitrogen oxide levels at the DPF inlet for accurate emissions control
• Engineered to meet or exceed OEM specifications for reliable performance
• Helps maintain proper selective catalytic reduction (SCR) system operation
• Includes sensor connector for straightforward installation

This NOx sensor is essential for maintaining proper diesel emissions system function and preventing check engine lights related to NOx sensor circuit faults. Dorman engineers this sensor as a cost-effective alternative to dealer parts while maintaining quality and reliability.