AiM LCU-One S Wideband Lambda Controller

AiM LCU-One S Wideband Lambda Controller

The AiM LCU-One S is a wideband lambda controller for monitoring air/fuel ratio information in compatible motorsport and performance-engine applications. It uses a Bosch LSU 4.9 wideband sensor and sends the measured lambda data to a compatible AiM dash or data logger.

This is a measurement and controller module, not a standalone dash or data logger. The correct AiM master device, wiring, sensor position, exhaust temperature, fuel type, and configuration all matter to the installation.

Air/fuel measurement for setup and analysis

• Wideband lambda measurement for observing mixture conditions during testing and tuning.
• Bosch LSU 4.9 sensor for the compatible LCU-One S installation.
• Lambda range from 0.65 to 1.6 as specified for the controller.
• Configurable stoichiometric ratio for supported petrol, diesel, and alternative-fuel applications.
• Compatible AiM integration so lambda information can be displayed or recorded by the connected master device.

Lambda values below one generally indicate a richer mixture and values above one generally indicate a leaner mixture. Interpret the result in the context of the engine, fuel, calibration, exhaust system, sensor position, and the complete AiM configuration.

Race Studio 3 data visualisation reference.

Compatible AiM systems

The LCU-One S can be connected to compatible AiM dash and logger systems, including supported MXL2, MXG, MXP, MXS, Solo 2 DL, EVO4S, and EVO5 applications. Confirm the exact device, firmware, harness, and connection method before ordering.

For current dash and logger comparisons, see the AiM MXG Dash, AiM MXP Dash Logger, and AiM MXS 1.3 Dash Logger. Compatibility can vary by model generation and installation.

Lambda sensor installation

Install the lambda sensor where it can measure a representative exhaust-gas mixture while staying within the maximum permissible temperature. Sensor position and exhaust condition directly affect the usefulness and life of the measurement.

• Install where the exhaust gas is hot enough for representative measurement, without exceeding the sensor's permitted temperature.
• Where possible, install the sensor vertically with the wiring upward.
• Keep the sensor away from the exhaust outlet so outside-air influence is reduced.
• Ensure the exhaust passage is free from leaks near the sensor to avoid leak-air effects.
• Protect the sensor from condensation water.
• Do not paint, wax, or otherwise coat the sensor.
• Use only the recommended grease for the sensor thread.
• Confirm the installation is protected from impact and contact with the vehicle or track environment.

Installation should be completed by someone familiar with exhaust temperature, sensor placement, fuel systems, and the connected AiM equipment. Contact Harris Race Radios if you need help planning the installation in New Zealand or Australia.

Race Studio 3 workflow

Race Studio 3 is used with compatible AiM master devices to configure channels, display pages, maths channels, data downloads, and analysis. The LCU-One S supplies the lambda information; the connected AiM logger or dash determines how that information is displayed, recorded, and analysed.

Race Studio 3 setup reference from AiM's official documentation.

Official AiM and Race Studio videos

No dedicated LCU-One S video has been confirmed in the mapped official library, so these official videos cover the compatible AiM configuration, data-transfer, firmware, and Race Studio 3 workflows used around the controller.

For the complete official library, visit the AiM Academy Training Videos page.

LCU-One S support and documentation

Use the AiM Race Studio 3 Knowledge Hub for channel configuration, data analysis, firmware, and troubleshooting workflows. Visit AiM Downloads & Documentation for official live AiM software, firmware, and product-documentation sources.

For Bosch LSU 4.9 sensor installation, fuel compatibility, AiM dash or logger connection, lambda interpretation, or setup advice in New Zealand and Australia, contact Harris Race Radios.