The AEM X series 30-0300 wide band lambda gauge is a good companion for diesel or petrol tuning with a much wider measurement range than most other devices, using the CAN output it can measure lambda ranging from 0.55 up to 6.55 while the gauge display itself displays up to 2.00 lambda. This wide measurement range makes it better suited for diesel use than most other devices. The CAN bus output also ensures there is no offset or noise induced by analog voltage conversion of the signal as the values are transmitted digitally to the ECU. The CAN output is compatible with all of our controllers.

The kit includes the gauge, an LSU4.9 lambda sensor, a wiring harness and a mild steel M18x1.5 bung for welding to the downpipe. Suggested mounting location for the sensor is as close to the turbocharger as possible, and the sensor must be oriented at least 10 degrees above horizontal to avoid condensation from collecting in the sensor body.