Inline Wideband UEGO Controller

The AEM Electronics Inline Wideband UEGO Controller (model 30-0310) is a precision air-fuel ratio monitoring system designed for engine tuning professionals and performance enthusiasts who demand real-time combustion data. This inline wideband controller integrates seamlessly into fuel system tuning workflows, enabling accurate AFR measurement across a broad operating range from 8.5:1 to 18:1. Whether optimizing carburetor jetting, tuning fuel injection systems, or validating engine modifications, this controller provides the feedback necessary to maximize efficiency and power output while protecting against lean-burn damage.

The unit employs AEM's proven UEGO (Universal Exhaust Gas Oxygen) sensor technology to deliver stable, linear 0–5V analog output compatible with most aftermarket ECUs, standalone engine management systems, and data logging platforms. The inline configuration allows direct integration into exhaust systems or sensor bungs without disrupting OEM sensor architecture. UEGO sensors operate across the full combustion range—from rich idle conditions through lean cruise and wide-open throttle—providing superior resolution compared to narrowband oxygen sensors. The compact design (4.3 × 3.2 × 7.6 inches) and lightweight construction (1.58 lbs) facilitate clean installation in tight engine bays while the kit format includes all necessary connectors and mounting hardware for rapid deployment.

This wideband controller benefits street performance builders, race engine tuners, and diagnostic specialists seeking precise AFR control across all load conditions. It is compatible with both naturally aspirated and forced-induction platforms, making it ideal for turbocharged or supercharged applications where fueling accuracy is critical. The 0–5V output integrates with piggyback tuners, custom ECU code, and third-party data acquisition systems, allowing seamless incorporation into existing vehicle management ecosystems. Installation typically involves exhaust sensor placement, controller mounting on the firewall or interior panel, and wiring to your fuel control or telemetry system—no specialized tools required.