Vitesco 03L-907-807 AF Nitrogen Oxide (NOx) Sensor with Control Module

The Vitesco 03L-907-807 AF is a precision nitrogen oxide (NOx) sensor with integrated control module designed for diesel emissions control systems. This OEM-quality sensor plays a critical role in modern Selective Catalytic Reduction (SCR) systems by continuously monitoring NOx levels in the exhaust stream and communicating with the engine control unit (ECU) to optimize AdBlue injection rates.

Key Features:

• Integrated control module with CAN bus communication for accurate real-time NOx measurement
• High-temperature ceramic construction using yttria-stabilized zirconia (YSZ) for durability in exhaust environments
• Monitors nitrogen oxide emissions to ensure compliance with EPA and Euro emissions standards
• Provides feedback to ECU for precise AdBlue dosing and SCR catalyst efficiency monitoring
• Direct replacement OEM part (alternate part number: A2C1032760077)

The NOx sensor measures exhaust gas composition and enables the ECU to calculate the optimal amount of diesel exhaust fluid (DEF/AdBlue) needed to convert harmful nitrogen oxides into harmless nitrogen and water vapor. By comparing readings from upstream and downstream sensors, the system can monitor SCR catalyst performance and adjust injection rates to achieve up to 90% NOx reduction while preventing ammonia slip. This sensor includes a factory-fitted control module that cannot be unplugged and communicates directly with the vehicle's engine management system.

Common Failure Symptoms: Check engine light illumination, increased AdBlue consumption, reduced engine performance, limp mode activation, or diagnostic trouble codes P229E, P229F, P220A, P2200-P2204 related to NOx sensor circuit faults.