Seguler Downstream NOx Nitrogen Oxide Sensor 5WK96645H Compatible with Duramax Diesel Express Silverado Savana Sierra 12669595 12671388

100% new components and manufactured from high quality Material: Stainless Steel,Rubber, Plastic, Chips, Platinum etc. The NOx sensor is composed of high-quality materials, with stable and durable output signals, meeting the detection of NOx Easy installation:When the engine indicator light comes on, it indicates that there is a problem with the NOx sensor. Simply replace the parts, remove the damaged NOx sensor, and replace it with a new one What's For:The NOx (Nitrogen Oxide) sensor is typically a high-temperature device that measures the level of oxides in exhaust systems and the measurement also helps to optimize engine operation, ensuring proper functioning of the exhaust after-treatment system.