AEM X-Series Wideband UEGO AFR Sensor Controller Gauge

AEM X-Series Wideband UEGO AFR Gauge Kit (30-0300) | Fast Response Tuning

Monitor fuel ratios with the fast-responding AEM X-Series Wideband UEGO Gauge (30-0300). Features Bosch LSU 4.9 sensor, CANbus, and 0-5V outputs.

The AEM X-Series Wideband UEGO AFR Controller Gauge (PN 30-0300) features patent-pending X-Digital technology designed to deliver precise air/fuel ratio monitoring for automotive engine tuning. In independent tests comparing 17 wideband controllers, the AEM X-Series registered the fastest response times, making it a choice tool for reducing feedback lag and ensuring accurate feedback control during transient engine conditions.

Designed for versatile fitment, the gauge features a standard 52mm (2-1/16") outer diameter with a slim 0.825" total depth and an ultra-shallow gauge cup depth of just 0.200". The front panel includes a 7-segment digital display that is 87% larger than previous models, with programmable readout modes (AFR, Lambda, O2%) in 3- or 4-digit precision.

The package includes a factory-calibrated Bosch 4.9 LSU Wideband UEGO sensor. It supports factory resistor-trim calibration right out of the box with optional free-air calibration support as the sensor ages. Dual analog (0-5V) and digital serial (RS232) outputs allow easy integration with aftermarket ECUs, standalone engine management systems, and data loggers, while built-in AEMnet (CANbus) enables daisy-chaining up to 16 individual channels.

Best Uses

1. Engine Tuning & Dyno Sessions: Monitor real-time air/fuel ratio changes to fine-tune fuel maps on carbureted or EFI engine setups.
2. Forced Induction Protection: Track engine fueling on turbocharged or supercharged vehicles to prevent lean conditions during high-boost operation.
3. Standalone ECU Integration: Route fast 0-5V analog or RS232 signals directly to engine management systems for closed-loop fueling feedback.
4. Multi-Cylinder Data Logging: Utilize AEMnet CANbus connectivity to daisy-chain up to 16 individual sensor controllers across multiple engine cylinders.

Features

1. Patented X-Digital Technology: Built with high-speed digital architecture that provides low deadtime and rapid response rate to exhaust gas changes.
2. Bosch 4.9 LSU UEGO Sensor Included: Comes complete with a factory-calibrated Bosch oxygen sensor, wiring harness, and mild-steel weld-in bung.
3. Dual Calibration Support: Utilizes factory resistor-trim calibration out of the box while retaining the option for manual free-air calibration over time.
4. Slim 52mm Gauge Profile: Fits standard 2-1/16" gauge pods with a slim 0.825" total mounting depth and 0.200" cup depth.
5. Multiple Output Interfaces: Features 0-5V analog, RS232 serial, and AEMnet CANbus outputs for data logging and ECU closed-loop control.

Benefits

1. Prevents Engine Damage: Real-time visibility into lean conditions helps safeguard forced-induction and high-compression engines from detonation.
2. Faster Data Transmission: Low latency ensures feedback signals reach loggers and ECUs instantly for tight closed-loop tuning control.
3. Simple, No-Cal Setup: The pre-calibrated sensor resistor eliminates mandatory free-air calibration procedures upon initial installation.
4. Easy Dashboard Fitment: The ultra-shallow housing fits effortlessly into tight dashboard spaces, steering column pods, and custom panels.
5. Clear Visual Readouts: The auto-dimming LED display with 87% larger digits remains legible in both full sunlight and night driving conditions.