AEM X-Series Wideband UEGO AFR Sensor

AEM’s X-Series Wideband AFR Gauge (PN 30-0300) is the fastest responding wideband air/fuel ratio controller on the market, thanks to its patented X-Digital Technology. Co-developed with FAE, this advanced wideband sensor delivers lightning-fast response and exceptional accuracy, ideal for both EFI and carbureted applications, using gasoline (incl. leaded), ethanol, methanol, diesel, propane, and CNG.

Featuring a sleek 52mm gauge with a large, easy-to-read digital display and ultra-slim depth, it fits virtually any build. The user-configurable display lets you switch between AFR, Lambda, or O2%, and supports CANbus output for multi-controller setups (up to 16 cylinders).

Additional highlights:

No free-air calibration required (but optional)

Compatible with AEM FAE & Bosch LSU 4.9 sensors

Outputs: 0-5V, RS232, and AEMnet (CANbus)

Auto-dimming display

Interchangeable black or silver bezels and faceplates

Perfect for tuners who demand precision, speed, and reliability in high-performance environments.