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

Flex Fuel Sensors

Flex Fuel Sensor Pigtail

Flex Fuel Sensor

Flex Fuel Sensor Connector & Pins