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 wideband air/fuel UEGO controllers. This product carries a California Proposition 65 warning per the manufacturer's data.
These sensors have a laser-etched, calibrated resistor in the connector body that is specifically created for the exact sensor it is attached to; modifying this will invalidate the sensor's output. The wideband 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.
Specifications:
- Sensor Type: Bosch LSU 4.9 wideband UEGO
- Accuracy: 0.1 AFR, factory calibrated
- High-quality sealed sensor housing, 360-degree welded wetted area, impervious to automotive fluids
- Replacement sensor only (no controller included)
- Warranty: Manufacturer's limited 90-day warranty
- Part Number: 30-2004
FAQ
Does this sensor require free-air calibration?
No, it never requires free-air calibration when used with an AEM wideband AFR controller, since it is factory calibrated at the Bosch factory to 0.1 AFR accuracy.
What is included with this kit?
It includes only the replacement sensor with attached cable and male connector - no controller is included.
What is the warranty on this sensor?
It carries the manufacturer's limited 90-day warranty.

