AEM's Bosch 4.9LSU wideband UEGO O2 replacement sensor kit includes only the sensor, with attached cable and male connector, intended to replace an existing mounted wideband sensor used with an AEM wideband air/fuel UEGO controller. Each sensor has a laser-etched, calibrated resistor in the connector body that is specifically matched to that sensor; modifying it invalidates the sensor's output. The sensor is laboratory-calibrated at the Bosch factory, accurate to 0.1 AFR, and never requires free-air calibration when used with an AEM wideband AFR controller.
WarrantySpecifications:
- Bosch 4.9LSU wideband UEGO O2 sensor, replacement sensor only
- Laser-etched, factory-calibrated resistor matched to the specific sensor
- Laboratory-calibrated at the Bosch factory, accurate to 0.1 AFR
- Never requires free-air calibration when used with an AEM controller and connector plug
- Sealed, welded housing is virtually impervious to automotive fluids
- Connector and pins included
- Part Number: 30-2004
FAQ
What is included with the AEM 30-2004 sensor?
It includes only the Bosch 4.9LSU sensor with attached cable, male connector, and pins -- intended as a replacement for an existing mounted wideband sensor.
Does the replacement sensor need calibration?
No, it is laboratory-calibrated at the Bosch factory to 0.1 AFR accuracy and never needs free-air calibration when used with an AEM controller.
Can the connector's resistor be modified?
No, the laser-etched resistor is specifically matched to that individual sensor; modifying it will invalidate the sensor's output.

