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Fuel-It

Fuel-It BMW B58 Flex Fuel Ethanol Content Sensor Kit - Bluetooth Analyzer & 0-5V JB4 Output - Plug & Play E85 - F20 F22 F30 F32 M140i M240i 340i 440i

Fuel-It BMW B58 Flex Fuel Ethanol Content Sensor Kit - Bluetooth Analyzer & 0-5V JB4 Output - Plug & Play E85 - F20 F22 F30 F32 M140i M240i 340i 440i

£327.21
£384.95 £327.21
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

BMW B58 Ethanol Percentage Monitor with Wireless App and Tuning Outputs for F-Series 1, 2, 3, 4 Series

Drive harder on ethanol blends with confidence. This direct-fit Fuel-It kit delivers live fuel composition data on your phone, integrates cleanly with popular tuning hardware, and installs without cutting. Built for the B58-powered M140i, M240i, 340i and 440i, it is a proven upgrade for anyone running E blends and wanting consistent performance, safer mapping and simple, reversible installation.

We have installed and used this setup on customer builds and the feedback is superb. Quick fitment, tidy hose routing with billet adapters, accurate readings and rock-solid reliability on high-ethanol fuels. If you are searching for a flex-fuel conversion, ethanol blend gauge, wireless ethanol reader or an analogue 0 to 5 V feed for your tuner, this is the one to choose.

Main advantages

  • Direct-fit in the engine bay with OEM-style connections. No cutting. Fully reversible.
  • Live alcohol content to your smartphone via Bluetooth wireless. iOS and Android app purchase required.
  • Integration options for tuners. Choose analogue 0 to 5 V for JB4 or 50 to 150 Hz raw frequency output.
  • E85-ready PTFE-core -6AN lines and anodised billet fittings designed for high ethanol use.
  • Optimised for B58 F-series platforms including xDrive models for dependable results on E blends.

What is in the box

  • Two E85-safe -6AN fuel hoses
  • Custom anodised billet adapters
  • Ethanol sensor unit
  • Bluetooth wireless analyser
  • Accessories pack

How it works

The assembly sits where the factory feed line enters the bay. Unclip the original hose, click in the supplied lines, connect the analyser and you are ready to view fuel composition. Returning to stock is just as fast.

Data and output options

  • Bluetooth wireless only
  • Bluetooth plus analogue 0 to 5 V output for JB4 integration
  • Bluetooth plus 50 to 150 Hz raw frequency signal

App functionality requires purchase of the compatible smartphone app on iPhone or Android.

To simplify installation, the standard Bluetooth analyser version is supplied without additional JB4 wiring so all plumbing and electrical connections can be completed under the car. If you prefer the traditional analyser with 0 to 5 V output as well as Bluetooth, request the traditional analyser at checkout. It will be included at no extra charge and the additional connections are made in the engine bay.

Vehicle coverage

BMW B58 applications

1 Series

  • F20 LCI (09/2015 - 06/2019) M140i and M140ix
  • F21 LCI (09/2015 - 06/2019) M140i and M140ix

2 Series

  • F22 (09/2015 - 06/2017) M240i and M240ix
  • F22 LCI (09/2016 - 12/2019) M240i and M240ix
  • F23 (09/2015 - 06/2017) M240i and M240ix
  • F23 LCI (10/2016 - 12/2019) M240i and M240ix

3 Series

  • F30 LCI (10/2014 - 10/2018) 340i and 340ix
  • F31 LCI (10/2014 - 06/2019) 340i and 340ix
  • F34 GT LCI (09/2015 - 12/2019) 340i and 340ix

4 Series

  • F32 (04/2015 - 02/2017) 440i and 440ix
  • F32 LCI (05/2016 - 12/2019) 440i and 440ix
  • F33 (03/2015 - 02/2017) 440i and 440ix
  • F33 LCI (05/2016 - 12/2019) 440i and 440ix
  • F36 Gran Coupé (03/2015 - 02/2017) 440i and 440ix
  • F36 Gran Coupé LCI (05/2016 - 12/2019) 440i and 440ix

Professional fitting and support

Want this installed by specialists who know B58 platforms inside out? Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

We will verify fitment prior to shipping. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm suitability for your car.

Important notes

Ethanol sensors infer alcohol content by reading the absence of petrol in the sample. If the fuel is contaminated, displayed ethanol percentage can be artificially elevated.

Part number

FI094

Media

B58 ethanol blend monitor with Bluetooth for BMW F-series M140i M240i 340i 440i

Why B58 owners choose this kit

Ethanol percentage monitor, fuel composition reader, flex-fuel conversion kit for BMW, wireless ethanol gauge, E-content display, E85 upgrade for M140i M240i 340i 440i, smartphone ethanol app, Bluetooth ethanol meter, B58 ethanol analyser, analogue 0 to 5 V ethanol output for JB4, frequency 50 to 150 Hz signal, PTFE -6AN fuel hose, billet fuel line adapters, direct-fit F20 F21 F22 F23 F30 F31 F34 F32 F33 F36, xDrive compatible, corn fuel tune support, safe mapping on E blends, quick install ethanol kit, reversible flex-fuel solution, UK supplier for BMW performance parts.

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