AEM Performance Electronics® 30-2063 - Wideband UEGO Sensor with Stainless Tall Manifold Bung Install Kit

Ordinary “narrow band” O2 sensors, like those used on production vehicles, are only accurate within a very narrow AFR range, the region surrounding stoichiometric operation and leaner. In the rich region where high-performance engines usually operate, they are highly inaccurate. The Bosch 4.2LSU UEGO sensor however, is a wideband sensor and able to detect the exhaust’s O2 content across a wide range. It uses a “current pump” to determine the actual oxygen concentration within the sensing element. The output is in the form of a very small current, which varies depending on the air/fuel ratio. This is completely different from a narrow band O2 sensor, which directly outputs a voltage. The UEGO sensor design allows measurement of the exact AFR over the entire operating range.

Each AEM UEGO sensor is individually calibrated and a resistor integral at the connector body is laser trimmed with this value. This process replaces the traditional “free air” calibration procedure when changing sensors and implements a sensor specific calibration for unparalleled accuracy.

The stainless steel weld-in sensor bung is specifically designed so the sensor can provide accurate AFR readings with minimal flow intrusion and survive extreme exhaust gas temperatures.