Inline Wideband UEGO Controller

The AEM Electronics Inline Wideband UEGO Controller (model 30-0310) is a precision engine management tool designed for serious tuners and performance-oriented mechanics who need accurate, real-time air-fuel ratio monitoring. Whether you're dialing in a modified engine, troubleshooting a rich or lean condition, or validating custom ECU tuning on the dyno, this wideband oxygen sensor controller delivers the data accuracy you need to optimize combustion efficiency and maximize power output.

Built by AEM Electronics, a leader in engine management technology, this controller transforms diagnostic guesswork into precise tuning decisions. The inline design integrates a UEGO (Universal Exhaust Gas Oxygen) sensor interface that continuously measures exhaust oxygen content across a wide operating range, translating raw sensor voltage into precise air-fuel ratio (AFR) values readable on compatible display units or data loggers. Unlike traditional narrowband oxygen sensors that only signal rich or lean conditions, the AEM wideband controller provides granular AFR feedback essential for turbo applications, supercharged builds, alternative fuel systems, and high-boost scenarios where stoichiometric precision directly impacts reliability and performance.

The controller's compact form factor allows straightforward installation in engine bays with minimal packaging complexity. Weighing 1.58 lbs, it is designed to resist electrical noise common in modified vehicles, ensuring reliable performance. This product is best suited for turbo, supercharged, and modified engines, and is compatible with standalone ECUs, piggyback systems, and data loggers.