AEM Universal Wideband Failsafe Gauge Kit

by AEM
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Original Price $825.00
Current Price $619.00
SKU aem30-4900
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AEM Universal Wideband Failsafe Gauge Kit

The Wideband FAILSAFE Gauge is a Universal Exhaust Gas Oxygen (UEGO—“you-way-go”) controller with an internal boost sensor, an internal data logger and a full-colour Organic Light Emitting Diode (OLED) display. It includes technology to activate a failsafe strategy in the event AFR falls outside of a user-defined operating window. If the AFR falls outside of the set operating window, the Wideband FAILSAFE Gauge triggers a user-defined output function that can save an engine from catastrophic damage.

This product is a must-have for all tuned performance engines, either forced induction or naturally aspirated, fuel-injected or carbureted. Any high-performance vehicle owners who want a highly accurate AFR tuning tool with logging and a protection strategy that can save an engine from catastrophic failure will want this FAILSAFE device.

*WHAT IT DOES* After the engine is tuned and a safe operating window of AFR is established, the Wideband FAILSAFE Gauge continually monitors AFR and boost or vacuum to make sure that AFR does not fall out of the defined operating window at a given boost or vacuum level. If the Wideband Failsafe detects an out of range AFR reading, the gauge triggers a low side output (ground signal with a 1.5 amp draw max) that can save your engine from catastrophic damage.


  • Displays both boost or vacuum and AFR or Lambda simultaneously on the same gauge
  • No free air calibration required – ever
  • Internal boost sensor
  • Bosch Wideband UEGO sensor and weld-in bung included
  • On-Board 3+ hour Datalogging capability at 20hz per parameter
  • Full-colour Organic Light Emitting Diode (OLED) Display in center, user selectable feature (boost/vacuum or AFR)
  • 24 three-color sweeping LEDs, user selectable feature (boost/vacuum or AFR)
  • Intuitive setup software
  • Dimmer input included
  • Interchangeable faceplates and bezels (see options, below)
  • Data analysis using AEMdata software