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  1. AEM Wideband UEGO Gauge Controller
    $250.37

    AEM’s legendary Digital Wideband O2 AFR UEGO Gauge is a wideband UEGO air/fuel ratio controller (AFR) and gauge in one. It unites accuracy, speed and control with an easy to read, digital LED display and sweeping LED “needle” that changes colors as AFR changes from rich to lean.

    NOTE: The 30-4100 Wideband UEGO Gauge Controller that uses the Bosch 4.2 LSU sensor has been superseded to the 30-4110 Wideband UEGO Gauge Controller that uses the Bosch 4.9 LSU sensor. The 30-4110 Wideband Controller Gauge is cosmetically identical to the 30-4100. Instructions for the 30-4100 are still available for download off of AEM's website

    WHAT IS A WIDEBAND UEGO AIR/FUEL CONTROLLER?

    AEM's Wideband UEGO (Universal Exhaust Gas Oxygen, pronounced “You-Way-Go”) Controllers are powerful, cost effective tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of their engine.

    WHY USE A WIDEBAND AIR/FUEL CONTROLLER?

    Accurate AFR data is critical when tuning an engine. Running rich (very low air/fuel ratio, excessive fuel) can cause a loss in power, while running too lean (very high air/fuel ratio, not enough fuel) may result in serious engine damage. Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency. AEM has a comprehensive line of highly accurate, reliable wideband air/fuel controllers that can help ensure your vehicle is optimally tuned.

    WHAT IS FREE-AIR CALIBRATION?

    Some of our competitors require that you frequently perform a free-air calibration procedure to calibrate their O2 sensors. This process involves removing the sensor from the bung while still connected to the controller device, then waving the sensor in the air so it can read atmospheric O2 levels. We use Bosch 4.9 LSU sensors in our wideband controllers. Our sensors are individually laboratory-calibrated by Bosch and never require free air calibration!

    CAN I CHANGE THE AEM UEGO SENSOR’S CONNECTOR?

    No. There is 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 invalidate the sensor’s output.

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  2. AEM AEMnet Adapter for Wideband Failsafe Gauge (p/n 30-4900)
    $21.99

    AEMnet is the technology that allows multiple AEMnet enabled devices to share information with each other through a single cable. 

    AEMnet is an open architecture software and hardware interface based on the CAN 2.0 specification, which provides the ability for multiple enabled devices to easily communicate with each other through a single cable. The hardware connection is made through a Deutsch 4P DTM connector and contains 12 volt switched power and ground (2A max) as well as the CAN data lines. Devices connected to the AEMnet transmit data through this one connection and most of these devices receive power from this same connection as well.
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  3. AEM Wideband UEGO Replacement Sensor
    $89.99

    OVERVIEW
    This kit includes a Bosch 4.2LSU sensor for use with any AEM Wideband UEGO Controller or Gauge.

    The Bosch 4.2LSU sensor, which gives AEM Wideband controllers their speed and accuracy, is laboratory calibrated at the factory and never requires free air calibration when used with an AEM controller!

    KEY FEATURES

    • No free air calibration required - ever
    • Accurate to 0.1 AFR
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  4. AEM Wideband UEGO Gauge Controller (No Sensor)
    $137.17

    AEM's part number 30-4110NS Wideband UEGO air/fuel ratio Controller Gauge is sold without a wideband sensor. This allows users to source a Bosch 4.9LSU sensor separately to potentially save money.

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  5. AEM X-Series OBDII Wideband AFR Controller Gauge
    $238.65

    The Flex Fuel Wideband FAILSAFE Gauge (PN 30-4911 w/ Ethanol Content Sensor) displays Air/Fuel Ratio, Boost/Vacuum and Ethanol Content, and can actively protect your engine from damage if it runs lean or excessively rich. IF YOU HAVE A FLEX FUEL SENSOR, PLEASE CLICK ON PN 30-4910.

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