AEM's Digital Wideband O2 AFR UEGO Gauge combines a wideband UEGO air/fuel ratio controller and gauge in one 52mm housing. It uses an easy-to-read digital LED display with a sweeping LED "needle" that changes color as AFR shifts from rich to lean, giving racers and tuners accurate, real-time air/fuel data for tuning naturally aspirated and forced-induction engines. Unlike competing gauges that require frequent free-air calibration, AEM's individually lab-calibrated 4.9 LSU sensors never need it. Note: the earlier 30-4100 gauge (4.2 LSU sensor) was superseded by the 30-4110 (4.9 LSU sensor) in August 2014; 30-4100 instructions remain available in the Instructions tab.
WarrantyInstallation Instructions
Specifications:
- 4.9 LSU wideband sensor and weld-in bung included
- No free-air sensor calibration required, ever
- 0-5V analog output (10-20 AFR range only)
- 52mm (2-1/16") gauge housing
- Interchangeable black/white faceplates and black/silver bezels included
- Part Number: 30-4110
FAQ
What is a wideband UEGO air/fuel controller used for?
It accurately monitors the engine's air/fuel ratio (AFR) in real time, which is critical for safe, effective tuning - running too rich costs power, while running too lean risks engine damage.
Does this gauge need free-air calibration?
No. AEM's 4.9 LSU sensors are individually laboratory-calibrated and never require the free-air calibration procedure some competing wideband controllers do.
What's included with the 30-4110 gauge?
It includes the gauge, a 4.9 LSU wideband sensor, a weld-in bung, and interchangeable black/white faceplates with black/silver bezels.
