Fuel It Bluetooth/CANflex Flex Fuel Kits For G2X BMW M240i/M340i/M440i B58 Gen2

If you're running E85 or ethanol mixes in your B58 you need this kit! Know your exact ethanol content in real-time via the LED display and/or Fuel-It! or JB4 app on your smartphone or tablet.

This is a complete plug & play kit to install a flex fuel kit in your G-chassis B58 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:

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.

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.

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)
• Download the free Android CANflex app here: https://www.jb4logs.com/canflex.apk / iOS coming soon! 

 

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)

 

This kit is compatible with the following:

• 2022+ G42 BMW Gen 2 B58 M240i
• 2019-2024 G20 G21 BMW Gen 2 B58 M340i
• 2021-2024 G22 G23 G26 BMW Gen 2 B58 M440i
• 2017+ G30 BMW Gen 2 B58 540i

 

*For the BMW G-series JB4 platform connect the white or blue wire to position #4 on the JB4 25 pin harness.  Select WMI Ethanol Setup option 0 to enable pin location 2/3/4 flex fuel input.

*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.