AEM Flex Fuel Ethanol Sensor Kit

The AEM Flex Fuel Ethanol Sensor Kit allows accurate ethanol content monitoring for Subaru WRX and STI applications running E85 or flex fuel tuning setups. Designed around the proven GM-style ethanol content sensor, the AEM kit delivers real-time ethanol percentage data critical for modern flex fuel calibrations and high-performance street or track builds.

Ideal for EJ and FA Subaru platforms using standalone ECUs, COBB flex fuel systems, or custom tuning solutions, the AEM Ethanol Sensor Kit helps provide safer tuning, improved fuel monitoring, and consistent ethanol content feedback under varying fuel conditions.

Built with motorsport-focused reliability and compact installation in mind, the kit integrates cleanly into custom fuel system setups.

Features:

• GM-style ethanol content sensor
• Real-time ethanol percentage monitoring
• Compatible with E85 and flex fuel applications
• Compact inline fuel system design
• Supports standalone ECU and flex fuel tuning setups
• Ideal for high-performance street and track applications
• Reliable motorsport-focused construction
• -6AN fuel line compatibility

Specifications:

• Sensor Type: GM Flex Fuel Sensor
• Fuel Compatibility: Gasoline / Ethanol / Flex Fuel
• Fitting Size: -6AN
• Output Signal: Ethanol content frequency signal
• Application: Inline fuel system installation

Ideal For:

• Subaru WRX & STI builds
• E85 and flex fuel setups
• Standalone ECU systems
• Custom fuel system builds
• Street and track applications

Part Number:
30-2201