AEM UEGO Wideband Air/Fuel Ratio Gauge 52mm with Bosch 4.9 LSU sensor — digital AFR, 0–5V output

The AEM 30-4110 UEGO Wideband Air/Fuel Ratio Gauge is a 52mm digital AFR gauge with a Bosch 4.9 LSU sensor, LED display and 0-5V output for accurate real-time air/fuel monitoring.

Designed for tuners, racers and performance enthusiasts, this compact gauge combines a bright digital readout and sweeping LED needle with AEM's fast-response Bosch wideband sensor. It ships with interchangeable bezels and faceplates so you can match your dash, and provides an analog output for logging or connecting to most engine management systems. The integrated Bosch 4.9 LSU sensor improves warm-up speed and reduces current draw compared with older sensors, and it never requires free-air calibration when used with this gauge.

How does the AEM UEGO gauge help me tune and protect my engine?

Accurate, timely AFR readings let you tune for peak performance while avoiding conditions that harm the engine. The gauge reports precise changes so you can spot trends and react before damage occurs.

• Displays fast digital AFR plus a color-changing LED sweep for instant visual feedback
• Detects small AFR shifts—useful for fine-tuning fuel maps
• 0–5V analog output allows logging and ECU integration
• Bosch 4.9 LSU sensor reduces warm-up time and current draw

What connections and components are included in the kit?

The package includes the gauge head, Bosch 4.9 LSU wideband sensor with a weld-in bung, and two harnesses to connect the sensor and power/outputs. Multiple bezels and faceplates enable quick visual swaps to suit your interior.

• Long harness for the UEGO sensor connection
• Short harness with four leads for power and 0–5V output
• Black and silver bezels and black/white faceplates for customization
• Weld-in bung and Bosch 4.9 LSU sensor included (PN 30-4110)

Will this gauge work with my data logger or aftermarket ECU?

Yes. The AEM gauge provides a standard 0–5V analog output that most logging systems and engine management ECUs accept. That output represents AFR in the 10–20 range and lets you record or feed AFR data directly into tuning software.

• 0–5V analog output compatible with common loggers and ECUs
• AFR reporting range: 10.0–20.0 (suitable for gasoline tuning)
• Fast sensor response improves recorded data accuracy
• Sensor and gauge connectors are specific; do not mix with older 4.2 LSU controllers

How do I mount and customize the gauge for my cockpit?

The 52mm (2-1/16") housing fits most standard gauge pods and can be mounted remotely if needed. Swapping bezels and faceplates is tool-light and allows a tailored look without modifying the gauge internals.

• Standard 52mm housing fits common pods and dash mounts
• Includes interchangeable black and silver bezels for aesthetic options
• Black and white faceplates let you choose contrast and visibility
• Remote mounting flexibility for custom installations

Who is this for: The AEM 30-4110 UEGO gauge is built for motorsports drivers, engine builders, and anyone who needs precise, fast AFR feedback while tuning or monitoring a performance engine. If you log data, run aftermarket ECUs, or simply want a reliable warning for dangerous lean or rich conditions, this compact wideband gauge and Bosch 4.9 LSU sensor deliver the speed and integration options required for professional-level tuning.