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Fuel-it CANbus/Bluetooth Flex Fuel Kit for BMW X3 & X4

Fuel-it CANbus/Bluetooth Flex Fuel Kit for BMW X3 & X4

Regular price $479.95 USD
Regular price $479.95 USD Sale price $479.95 USD
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Know your exact ethanol content in real-time via the Fuel-It! or JB4 app on your smartphone or tablet.

If you're running E85 or ethanol mixes in your BMW, you need this kit!

This is a complete plug and play kit to install a Bluetooth ethanol sensor in your X3 or X4. (Check compatibility for your platform below).

The 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(s)
  • 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

  • 2016+ B46/B48/B58 G01 BMW X3
  • 2017+ B46/B48/B58 G02 BMW X4

*For the BMW G-series JB4 platform 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.


*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

*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.

 Fuel-It! E85 Ethanol Content Tester

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