Mazda 3 Bluetooth Flex Fuel Kit for the 2021+ 2.5L Turbo

  • $479.95
Shipping calculated at checkout.

SKU: MAZ-FFK-A01

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 Mazda 3, you need this kit!

This is a complete plug and play kit to install a Bluetooth ethanol sensor in your 2021+ Mazda 3 2.5L Turbo (Check compatibility for your platform below).

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 downloaded to use this kit)
  • Plug and play harness
  • Includes both Bluetooth App & 5v analog output for JB4 or flash tuning

Replacement fuel lines are also available ala cart.

Vehicle Fitment

  • 2021+ Mazda 3 SKYACTIV® 2.5L Turbo

    *For the Mazda 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.

    *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 info@fuel-it.com

    *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.


    Install Video


    Product Video