AEM Bosch LSU 4.9 Replacement O2 SensorAEM's Bosch 4. 9LSU Wideband UEGO O2 replacement sensor kit includes only the sensor (with attached cable and male connector) and is intended to replace an existing mounted wideband sensor used with AEM Digital Wideband UEGO Air Fuel Controller Part Number 30 4110 and X Series Digital UEGO Wideband Part Number 30 0300. These sensors have a laser etched, calibrated resistor in the sensor's connector body. This resistor is specifically created for the
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