BMW M2, M3 & M4 Bluetooth Flex Fuel Kit for the G8X S58

  • $479.00
Shipping calculated at checkout.


If you're running E85 or ethanol mixes in your G8X M2, M3 or M4, you need this kit!

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

This complete flex fuel kit installs in under 30 minutes and reads your exact E85 mixture in the Fuel-It! smartphone app or JB4 app if equipped. Features CNC machined fittings for a quick plug and play installation with nylon sleeved stainless steel braided fuel lines for life long leak free operation.

The complete kit includes the following:

  • Genuine Continental ethanol sensor
  • Fuel-It! Bluetooth Universal Analyzer (view E85 mix via Fuel-It! app) OR CANflex ECA (no Fuel-It! app support without the Bluetooth ECA), view E85 mix via JB4 or flash logging)
  • Two stainless steel braided fuel lines with black nylon sheathing to protect your other engine bay components
  • Proprietary custom billet fittings for plug and play OEM integration
  • One wiring harness with Posi-tap connector
  • Bluetooth Model Supports stand-alone Bluetooth operation with the Fuel-It! app

Replacement fuel lines are also available ala cart.

This kit is compatible with the following:

  • 2021+ S58 G80 M3 
  • 2021+ S58 G82 G83 M4
  • 2023+ S58 G87 M2

*For the BMW G-series JB4 Bluetooth version connect the white 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.

*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 Analyzer.

*For CANflex adapter JB4 & MHD use engine bay CANbus connections in our guide. BM3 requires connection to CANbus wires on BCM module under passenger side dash or at the DME. E85 flex fuel sensor for S58 BMW

Fuel It FLEX FUEL sensor for S58 BMW M3 M4 G80 g82 g83 install location

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

Fuel It FLEX FUEL sensor KIT for S58 BMW M3 M4 G80 g82 g83 install location

Fuel-It! E85 Ethanol Content Tester

Install Video

Fuel-it! App Video