Flex Fuel Sensor

Optimize your engine’s tuning with our high-quality Flex Fuel Sensor. This sensor delivers real-time readings of ethanol content and fuel temperature, enabling your engine management system to dynamically adjust fuel and timing parameters for peak performance and safety.

Essential for E85 and ethanol-blended fuel applications, this sensor ensures accurate fuel mixture data, overcoming the variability of pump-labeled E85 and similar fuels.

Key Features

• Measures ethanol content (0–100%) and fuel temperature (-40°F to 257°F / -40°C to 125°C)

• Provides real-time output for dynamic ECU adjustment

• Available with:

  • 6″ pigtail pre-wired, or

  • Connector housing with crimp-on terminals/seals for custom harnesses

• Compact, corrosion-resistant design suitable for harsh environments

• Compatible with:

  • MS3Pro

  • MSPNP-Pro

  • MSPNP Gen 2

  • MegaSquirt 2 and 3

What’s Included

• Flex Fuel Sensor

• Connection Option (choose one):

  • 6″ pre-crimped pigtail

  • Connector and pins for custom wiring