⭕ Unused and in box comes with the O2 sensor.
AEM High quality product
PART# 30-4100

DESCRIPTION: AEM Gauge Type Wideband UEGO Controller

NOTE: UNIVERSAL

Sensor cable length 24cm
Extension cable length from gauge to sensor connector 3.57m

A wideband UEGO sensor controller accurately monitors Air/Fuel ratios (AFR) during the tuning process to prevent a lean fuel mixture, which could lead to engine damage. AEM has combined its single-channel wideband UEGO controller and gauge display into one unit, uniting unsurpassed AFR accuracy and control with an easy-to-read interface. AEMs Gauge-Type Wideband UEGO Controller features a digital LED display and sweeping LED needle that changes colors as AFR changes from rich to lean. The units 52mm (2-1/16) gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere.


Ideal AFR monitoring tool for EFI and carbureted applications, and engine dynamometers
Does not oscillate AFR reading like narrow band sensors
No laptop required for monitoring!
Bosch sensor included
Accurate to 0.1 AFR
Reads in AFR or Lambda via a switch in back of gauge housing
24 Color-coded LED display lights provide immediate reference to engines air/fuel ratio (AFR) or Lambda ratio
Integrated three-digit display reveals AFR or Lambda in real time
User-programmable 0-5v analog output included for use with data loggers and virtually any engine management system
Serial data stream included for output of AFR (RS 232)