Know your exact ethanol content in real-time with our new LED display or by using the BMS CANflex or JB4PRO on your smartphone or tablet.

Run E85 with confidence. The BMS CANflex kit gives your B48 or B58 Supra a clean, accurate way to read ethanol content and send that data directly to your tune.
This complete flex fuel kit, also known as an ethanol sensor kit, E85 sensor, flex fuel sensor, ethanol content sensor, fuel composition sensor, or flex fuel composition sensor, installs in about 30 minutes.
The CANflex ECA works as an ethanol content analyzer, E85 analyzer, and Bluetooth flex fuel analyzer in one compact system. It reads your fuel mixture using a genuine Continental® ethanol sensor and outputs the data through CANbus, Bluetooth, a built-in LED display, and 5v output for legacy support.
Perfect for Toyota Supra owners running E85, adding port injection, or wanting accurate real-time ethanol data for JB4, MHD, BM3, or EcuTek tuning.
Our new CANflex ECA sends your ethanol mixture four different ways for the ultimate tuning integration:
- CANbus via user selectable addressing for MHD, BM3, EcuTek, and JB4 integration
- Free CANflex Bluetooth app for iOS and Android
- LED display built into the head unit for quick visual readout
- 5v output for legacy support (older ECUs or non-CANbus JB4 integration)
Offered in both a plug and play harness and a universal harness. Manual transmission vehicles and BM3 require using the universal harness with posi-taps for CANbus.
The complete kit with the BMS CANbus ECA includes:
- Genuine Continental® ethanol sensor
- BMS CANflex LED ECA for use with JB4, MHD, & BM3
- Stainless steel braided fuel lines with black nylon sheathing to protect your other engine bay components
- Our new custom fitting now makes adding port injection easier than ever. Simply remove the 1/8" NPT fitting and add one of our optional port injection lines.
- Includes our 10bar low fuel pressure sensor critical for B58 tuning!
- Plug and play harness (optional)
- BMW/Supra Accessory Harness for S58/B58 motors
Download the free BMS CANflex app here:
Vehicle Fitment
Toyota
• 2020+ GR Supra Mk5 B58 3.0L 6 cyl.
• 2020+ GR Supra Mk5 B48 2.0L 4 cyl.
*Manual transmission or BM3 require universal harness. All others
can use PNP harness.
*For the Supra JB4 platform connect the white wire to position #4 on the JB4 25 pin harness. Select the WMI setup page and enable bit 0.


*If you aren't sure whether this kit fits your car, send us a picture of your engine bay with the engine cover removed to info@fuel-it.com