Never requires free-air calibration when used with an AEM Controller and connector plug
Specifically designed for use with AEM Wideband UEGO controller Part Number 30-4110
Replacement sensor only
AEM'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.