This FEBI BILSTEIN NOx sensor, part number 197497, is designed for urea injection systems. It plays a crucial role in monitoring and controlling nitrogen oxide (NOx) emissions from your vehicle's exhaust. Proper functioning of the NOx sensor is essential for the efficient operation of the selective catalytic reduction (SCR) system, which helps reduce harmful pollutants. By accurately measuring NOx levels, the engine control unit can adjust the urea injection rate to optimize emission reduction. FEBI BILSTEIN is known for producing high-quality automotive components. This sensor is manufactured to meet stringent standards, ensuring reliable performance and durability. Replacing a faulty NOx sensor can help restore your vehicle's emissions control system to its optimal performance and prevent potential issues with engine performance or regulatory compliance.