AEM Bosch LSU 4.9 Replacement Wideband O2 Sensor - 30-2004AEM's Bosch 4. 9LSU Wideband UEGO O2 replacement sensor kit includes 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. These sensors have a laser etched, calibrated resistor in the sensor's connector body. This resistor is specifically created for the exact sensor that it is attached to. Modifying this will
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