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FAQ
AEM Electronics - Ignition, Fuel and Methanol Systems
Is the AEM 30-2001 sensor the right replacement for my AEM wideband gauge?

Is the AEM 30-2001 sensor the right replacement for my AEM wideband gauge?

The 30-2001 is the old Bosch LSU 4.2 sensor used on AEM wideband gauges about 10 years ago. Current AEM X-Series AFR gauges use the AEM-FAE sensor. To be 100% sure which sensor your gauge needs, send us a photo of the sensor connector on your harness.