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. AEM's 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 unit's 52mm (2-1/16") gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere.  AEM Part# 30-4110

AEM X-Series Wideband UEGO AFR Sensor Controller Gauge with X-Digital Technology.
Includes: X-Series Wideband Controller Gauge, Bosch LSU 4.9 Sensor, Wiring Harnesses, Black Bezel, Black AFR/Lambda Faceplate & O2 Sensor Bung
AEM Part # 30-0300

AEM Bosch UEGO Replacement Sensor 30-2001

 AEM Universal EMS Wideband 02 Kit Sensor/ Bung/ Connector/ Wire-Seals/ Pins 30-2002

AEM X-Series Inline Wideband UEGO AFR Sensor Controller. Includes: X-Series Inline Wideband Controller, Bosch LSU 4.9 Sensor & O2 Sensor Bung
AEM Part # 30-0310

AEM X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit.
Includes Silver Bezel & White AFR/Lambda Faceplate
AEM Part # 30-0300-ACC

AEM Digital Wideband UEGO Gauge w/o Sensor
AEM Part # 30-4110NS