OEM Detroit / Freightliner / Mercedes Exhaust Gas Temperature Sensor (EGT) A01015429518. Application: Detroit SCR outlet temperature sensor, DD5 / DD8 This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete units from Detroit / Mercedes and then break them down so that we can sell the pieces individually. Due to this, there may be paint marks or minor cosmetic blemishes, but we assure you they are brand new and genuine.