This DELPHI NOx sensor (part code ANS1013-12B1) is engineered to accurately measure nitrogen oxide levels within your vehicle's exhaust system. It plays a crucial role in the proper functioning of the selective catalytic reduction (SCR) system, ensuring that urea (AdBlue) is injected at the correct rate to neutralize harmful NOx emissions. By providing real-time data to the engine control unit (ECU), this sensor helps maintain optimal performance and compliance with environmental regulations. Its robust construction is designed to withstand the harsh conditions of the exhaust environment, offering reliable and long-lasting service. Proper functioning of the NOx sensor is essential for reducing pollution and preventing potential engine fault codes related to emissions. Replacing a faulty sensor with this genuine DELPHI part will help restore your vehicle's emissions control system to its intended operational state.