Know your exact ethanol content in real-time via the LED display and/or Fuel-It! or JB4 app on your smartphone or tablet.

If you're running E85 and/or plan to run port injection in your S58, you need this kit!

This is a complete plug & play kit to install a flex fuel kit in your S58 equipped BMW in about 30 minutes.  (Check compatibility for your platform below)

Our CANbus ECA is compatible with JB4 as well as flash only applications like MHD, BM3, and EcuTek that read the standard 0xEC flex fuel CANbus address format .

We now offer 3 types of kits:

1. Complete Kit with CANbus ECA and PnP Harness = Includes a plug and play harness compatible with stock ECU flashes, JB4, ECUteck, and MHD.  *If you have a manual transmission or a BM3 tune, you must purchase the universal harness.
2. Complete Kit with CANbus ECA and Universal Harness = Includes universal harness that works for all applications including manual cars and those running a BM3 flex fuel tune.
3. Complete Kit with Fuel-It! Bluetooth ECA = Includes a bluetooth ECA for use with JB4 and the Fuel-It! app.  *Does not include CANbus integration 

The complete kit with the BMS CANbus ECA includes the following:

• 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.
• Plug and play harness (optional)
• BMW/Supra Accessory Harness for S58/B58 motors

The complete kit with Fuel-It! Bluetooth ECA includes the following:

• Genuine Continental® ethanol sensor 
  
• 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.
• Fuel-It! Bluetooth analyzer (iPhone or Android app must be downloaded to use this kit)
  
• Includes both Bluetooth App & 5v analog output for JB4 or flash tuning
  
  • Bluetooth (iPhone or Android app must be downloaded to use this feature)
  • If you are using an Apple product the app can be found by clicking here
  • If you are using an Android product the app can be found by clicking here

Vehicle Fitment
(manual cars not compatible with PnP harnesses)

BMW M2
• 2023+ S58 G87 BMW M2

BMW M3
• 2021+ S58 G80 BMW M3
• 2021+ S58 G80 BMW M3 Competition

BMW M4
• 2021+ S58 G82 BMW M4
• 2021+ S58 G82 BMW M4 Competition
• 2022+ G83 BMW M4 Convertible

BMW X3M
• 2020+ S58 F97 X3M
• 2020+ S58 F97 X3M Competition

BMW X4M
• 2020+ S58 F98 X4M
• 2020+ S58 F98 X4M Competition

*We have also made it optional to purchase all the items ala-cart should you choose but for the kit to work it must include the Fuel Lines, Ethanol Sensor, and CANflex analyzer.

*Ethanol Sensors don't actually read the ethanol content, the readings are based on the absence of gasoline, so if your fuel is contaminated your ethanol readings may be artificially elevated.

*Free shipping in USA on complete kits only.

CANflex LED settings:

PRODUCT VIDEOS

Click here if you are installing the CANFlex ECA in addition to your flex-fuel kit. 

BMS Universal Canbus E85 Analyzer Installation and review