AEM 30-4110 Wideband O2 Air Fuel Ratio UEGO Gauge 52MM (2-1/16"), AFR with Bosch 4.9 LSU Sensor, 0-5V Analog Output, Interchangeable Bezels & Faceplates

The AEM 30-4110 Wideband O2 UEGO Gauge is essential for optimizing engine performance and preventing damage, combining precision and durability. As a trusted AEM product, it delivers reliable accuracy for tuning and daily monitoring.A direct replacement for AEM part numbers 30-4110, 304110, 30-4100, 304100, 37301001, 30-0300, 300300, it’s ideal for EFI, carbureted engines, and dynamometers. Unlike narrow band sensors, it provides consistent AFR data to avoid power loss or engine damage.Equipped with a Bosch 4.9 LSU sensor and weld-in bung, it offers faster light-off and lower current draw than older 4.2 LSU models—no free air calibration needed. The 52mm (2-1/16") housing fits most gauge pods and can be remotely mounted for versatility.Multi-fuel compatible (E85, Ethanol, Methanol) with 0-5V analog output (10-20 AFR) for data loggers/engine management. The LED display and color-changing "needle" enable easy AFR monitoring at a glance.The complete kit includes all installation accessories and interchangeable bezels/faceplates for customizing your setup. Professional installation is recommended (no manual included). Check compatibility before purchase; contact us for support.

• Direct Replacement & Wide Compatibility: Exact replacement for AEM part numbers 30-4110, 304110, 30-4100, 304100, 37301001, 30-0300, 300300; compatible with EFI, carbureted applications and engine dynamometers, ensuring seamless fitment
• High-Precision Monitoring & Visibility: Features a digital LED display and sweeping LED "needle" that changes colors as AFR shifts from rich to lean, allowing accurate, real-time monitoring with a simplistic yet durable design-alerts to even 0.1 AFR changes to protect your engine
• Bosch 4.9 LSU Sensor & No Calibration Needed: Includes a high-performance Bosch 4.9 LSU wideband sensor and weld-in bung; faster light-off time and lower current draw than older 4.2 LSU sensors, with no free air sensor calibration required-ever
• Multi-Fuel Compatibility & 0-5V Output: 0-5V analog output (10-20 AFR range only) works with data loggers and most engine management systems; supports E85 (6.6-13.2:1 AFR), Ethanol (6.14-12.3:1 AFR), Methanol (4.4-8.8:1 AFR) and Lambda (0.68-1.36) values
• Customizable Design & Complete Kit: 52mm (2-1/16") gauge housing fits most gauge pods and can be remotely mounted; includes interchangeable black/silver bezels and black/white faceplates for custom appearance, plus all necessary installation accessories (harness, connectors, bung)