AEM Electronics replacement wide-band sensor harnesses facilitate the connection of an AEM wide-band O2 sensor to your AEM gauge. These harness replacements feature sealed sensor housings with a mating connector plug and long leads. Accurate air-fuel ratio data is critical when tuning an engine, and the AEM replacement wide-band sensor harnesses are designed to link with your sensors to bring you accuracy, speed, and control, along with easy-to-view readings.