This FEBI BILSTEIN NOx sensor, part number 197499, is specifically designed for urea injection systems. It plays a crucial role in monitoring nitrogen oxide (NOx) emissions from your vehicle's exhaust. By accurately measuring NOx levels, this sensor helps the engine control unit (ECU) to optimize the AdBlue injection process. This ensures that the selective catalytic reduction (SCR) system functions effectively, reducing harmful emissions and helping your vehicle meet environmental standards. FEBI BILSTEIN is known for producing high-quality components that meet or exceed original equipment manufacturer (OEM) specifications. Installing this NOx sensor will help maintain the performance and efficiency of your vehicle's emissions control system.