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Fuel-It! Bluetooth FLEX FUEL KIT for the B58 BMW M240i, M340i, & M440i


Product CodeFUE3H1JT24

Earn Reward Points: 479

Dollar Value of Points: $4.79

COMPLETE KIT - Fuel-It! Bluetooth FLEX FUEL KIT for the B58 BMW M240i, M340i, & M440i


If you're running E85 or ethanol mixes in your 2021+ B58 BMW M440i, 2019+ M340i, and 2022+ M240i you need this kit!

This is a complete plug & play kit to install a Bluetooth ethanol sensor in your 2021+ M440i, 2019+ M340i and 2022+ M240i in about 30 minutes.

(Check compatibility for your platform below)

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

The kit includes the following:

  • Genuine Continental® ethanol sensor
  • 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
  • Fuel-It! Bluetooth analyzer (iPhone or Android app must be purchased to use this kit)
  • Plug and play harness
  • 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 clicking here

This kit is compatible with the following

  • 2021+ G3X BMW B58 M440i
  • 2019+ G2X BMW B58 M340i
  • 2022+ G4X BMW B58 M240i
  • 2015+ G3X BMW B58 540i

 *For the BMW G-series JB4 platform connect the white wire to position #4 on the JB4 25 pin harness. Select WMI page bit 2 to enable.

*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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