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BMW fuel system electronics are crucial for the precise operation of your vehicleaEURtms fuel delivery system, optimizing fuel efficiency, and ensuring engine performance. These sophisticated components control essential functions such as fuel injection, fuel pump operation, and sensor data to manage fuel flow, maintain the correct air-fuel mixture, and improve emission control. BMW vehicles may also be equipped with flex fuel systems that adjust the air-fuel ratio depending on the type of fuel being used, allowing for better adaptability to E85 or other ethanol blends. Additionally, fuel pump control modules play a key role in regulating fuel pressure and ensuring the pump operates at optimal levels. Common issues with fuel system electronics include malfunctioning sensors, failing fuel injectors, and damaged fuel pumps or fuel pump control modules, leading to poor fuel economy, engine misfires, or stalling. Solutions to these problems include replacing faulty sensors, upgrading to high-quality fuel injectors, and ensuring the fuel pump control module is functioning correctly. By investing in premium components and performing regular maintenance, these issues can be minimized, extending the lifespan of the fuel system while ensuring peak performance.
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BM3 FlexFuel Kit - OEM Fuel Hat Location - BMW F-Series S55/N55 3.0L ...
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Bootmod3 - Corporate Logo
T#:33746522
Part#: BM3FFKTF55
Ships in 10 Business Days
$ 599.00 USD
Free Shipping on orders $49 and up

We are proud to bring out this truly awesome product that makes getting the required Flex Fuel hardware on your BMW and A9X Supra with incredible ease and minimal effort, in your own driveway.

Our kit is entirely plug-and-play with the factory vehicle harness. No cutting or splicing of OEM wiring/connectors. It installs in minutes and can be removed without a trace on the car!

Our team used SolidWorks to design a Flow Optimized Flex Fuel Sensor Adapter (FFSA) to ensure fuel flow is unobstructed and with no added pressure drop at full fuel pump flow from the fuel tank to your motor when our kit is installed. This is important when pushing the factory fuel system with all the power Ethanol can provide over petrol!

Flex fuel sensor housing is designed to neatly install into the factory BMW fuel hat location.

Flex Fuel Sensor Adapter also contains two 1/8 NPT ports that allow installation of an auxiliary Fuel Pressure sensor for vehicles that don’t come with an OEM one from the factory for future use. Depending on fitment, either port can be used.

Install the bootmod3 Flex Fuel Plug and Play Kit and flash your flex fuel enabled bootmod3 OTS MultiMap or Custom Map in minutes and you’re off to the races never worrying about alcohol/petrol blend % in your fuel tank. It does not get better or easier than this!

bootmod3 FlexFuel Plug and Play Kit:

  • Minutes to install at home as opposed to hours at a shop with car up on lift fabricating/cutting into factory fuel lines and splicing/cutting/pinning into OEM electrical
  • 4+ hours in time/cost savings to get going on Flex Fuel as compared to most other kits that require making custom fuel lines, fittings and custom wiring! 
  • Fully reversible/removable and back to stock without a trace in minutes
  • Custom 3-piece Aluminum-6061 Flex Fuel sensor adapter with built-in sensor bypass to allow for obstruction free fuel flow made to fit in the vehicle factory fuel hat area below the rear seat
  • All connecting points sealed with fuel safe Viton o-rings
  • Flex Fuel Sensor Adapter housing provides additional 1/8 NPT ports for optional Fuel Pressure sensor addition to vehicles without a factory one for bootmod3 CustomROM v2 support
  • CANBUS Enabled Ethanol Content Analyzer (ECA) that integrates with bootmod3 CustomROM for complete and seamless conversion of your BMW to FlexFuel for bootmod3 Flex Fuel enabled OTS MultiMaps and custom tunes with your bootmod3 tuner of choice
  • Power/CANBus 4-wire plug and play harness
    • 100% Fully Plug and Play harness to the BMW Fuel Controller connectors (EKP3) on S55, N55 vehicles
    • 100% Fully Plug and Play harness on the BMW Body Domain Controller (BDC/FEM) connector on Gen1 F-series B48/B58
  • Continental Flex Fuel sensor 3-wire harness
  • Custom Aluminum-6061 CANBus Enclosure for the bootmod3 ECA board
  • Custom, kink-free teflon braided line allowing plug and play installation with the OEM fuel hat and factory 5/16” or 3/8” fuel feed line. No cutting or new lines required.
  • -6 AN fitting by Racetronix

OEM FUEL HAT LOCATION KIT IS INTENDED FOR OEM FUEL PUMP AND ASSOCIATED WIRING. ANY VARIATIONS TO FUEL LINES OR FUEL PUMPS MAY NOT BE COMPATIBLE. USE THE ENGINE BAY INSTALLATION KIT WHERE AVAILABLE INSTEAD.

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G8X S58 Flex Fuel Kit
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Fuel-It! - Corporate Logo
T#:8061332
Part#: S58FLEXFKIT
Ships on Jul 27, 2026
$ 479.00 USD
Free Shipping on orders $49 and up
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 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 Supports stand-alone Bluetooth operation with the Fuel-It! app **For the BMW G-series JB4 platform connect the white wire to position #4 on the JB4 25 pin harness. Select WMI page option 2/3/4 input to enable.
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Fuel-It! FLEX FUEL KIT For S58 BMW X3M & X4M - Complete Kit With Blue...
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Fuel-It! - Corporate Logo
T#:15976528
Part#: S58X3MFFK-BTECA
Ships in 2 Business Days
$ 479.99 USD
Free Shipping on orders $49 and up
This is a complete plug-and-play kit to install a Bluetooth ethanol sensor in your X3M or X4M in about 30 minutes. The kit includes the following: New 5/16" E85 compatible fuel lines for your engine bay 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) Plug-and-play harness Includes both Bluetooth App & 5v analog output for JB4 or flash tunin This kit is compatible with the following 2020+ BMW X3M / X3M Competition 2020+ BMW X4M / X4M Competition *For the BMW S58 JB4 platform connect the white wire to position #4 on the JB4 25 pin harness. Select WMI page option 2/3 input to enable. *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.
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BM3 FlexFuel Kit - Engine Bay Location - BMW G8X S58
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Bootmod3 - Corporate Logo
T#:43648854
Part#: BM3FFHFGS58EB
Ships in 10 Business Days
8% off MSRP $ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
Plug and play flex fuel solution for BMW G80 M3, G82/83 M4, & G87 M2 models

BMW F8X S55 Flex Fuel Kit | Fuel-It!
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Fuel-It! - Corporate Logo
T#:21275562
Part#: FFK-S55-STO
Ships on Jul 27, 2026
$ 549.99 USD
Free Shipping
$ 549.99 USD
Free Shipping

BMW F8X S55 Flex Fuel Kit | Fuel-It! from Turner Motorsport is essential for those running E85 or ethanol blends in their BMW. This comprehensive kit offers a plug-and-play solution for installing a Bluetooth ethanol sensor in your S55-powered vehicle.

  • Complete Upgrade: Replaces stock fuel lines with -6an E85-compatible lines from the fuel tank to the engine bay.
  • Advanced Monitoring: Includes an ethanol sensor and Bluetooth analyzer for real-time ethanol content monitoring.
  • Versatile Compatibility: Supports both Bluetooth App and 5v analog output for integration with JB4 or flash tuning.
  • Custom Fitment: Options available for stock HPFP setups, port injection kits, or non-Fuel-It! port injection systems.
  • High-Quality Components: Features BMS custom billet aluminum fittings for a seamless integration without modifications.
  • Off-Road Use Only: Designed for off-road applications, ensuring high performance for enthusiasts.
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Fuel-It! Flex Fuel Kit - N54/N55 E Chassis
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Fuel-It! - Corporate Logo
T#:21242695
Part#: FFK-N5XA
Ships on Aug 7, 2026
Starting at $ 485.99 USD
Free Shipping on orders $49 and up
Starting at $ 485.99 USD
Free Shipping on orders $49 and up
If you are 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 E-Chassis BMW. This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgraded -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. Includes both Bluetooth App & 5v analog output for JB4 or flash tuning. For your fuel line upgrade, choose the option that supports your current configuration. HPFP to the fuel tank: (Stock) This upgrade replaces both stock fuel lines with one upgraded continuous fuel line from the fuel tank to the HPFP and adds the ethanol sensor. Port Injection to the fuel tank: If you are running our port injection kit, this upgrade replaces the stock fuel lines from the tank to the engine bay, integrates the ethanol sensor and then utilizes a Y adapter to supply the HPFP and PI with fuel. Our custom fittings remove those tee's and extra fittings for a cleaner high flow setup. Non-Fuel-It! port injection to fuel tank: Choose this option if you are running a port injection kit that we did not manufacture or sell. This kit includes a longer 18" feedline from the Y to the port injection rail. You then cut the feed line to the length you need and install the included -6an female fitting or -6an female elbow to make the connection to your port injection rail. All of these kits utilize the BMS custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. *For the BMW N54 E-series JB4 platform connect the white wire to position #15 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *For the BMW N55 E-series JB4 platform connect the white wire to position #16 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *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.
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Fuel-It! Flex Fuel Kit - N20/N26 F Chassis
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Fuel-It! - Corporate Logo
T#:21275574
Part#: FFK-N20/6F-FK
In Stock
$ 369.99 USD
Free Shipping on orders $49 and up
This is a complete plug and play kit to install a Bluetooth ethanol sensor in about 30 minutes! The kit includes the following: New 5/16" E85 compatible fuel lines for your engine bay Genuine Continental ethanol sensor Fuel-It! Bluetooth analyzer Plug and play harness ​​Includes both Bluetooth App & 5v analog output for JB4 or flash tuning NOTICE: If you have an N26 motor type, you will need to retrofit the HPFP supply line to part number 13537585415 to be compatible with this kit. *For the BMW F-series JB4 platform connect the white wire to position #14 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 14/15/16 flex fuel input. *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.
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BM3 FlexFuel Kit - Engine Bay Location - BMW F-Chassis B58 B48 ...
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Bootmod3 - Corporate Logo
T#:36303296
Part#: BM3FFKFB58EB
Ships in 10 Business Days
8% off MSRP $ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up

We are proud to bring out this truly awesome product that makes getting the required Flex Fuel hardware on your BMW with incredible ease and minimal effort, in your own driveway.


Our kit is entirely plug-and-play with the factory vehicle harness. No cutting or splicing of OEM wiring/connectors. It installs in minutes and can be removed without a trace on the car!


Our team used SolidWorks to design a Flow Optimized Flex Fuel Sensor Adapter (FFSA) to ensure fuel flow is unobstructed and with no added pressure drop at full fuel pump flow from the fuel tank to your motor when our kit is installed. This is important when pushing the factory fuel system with all the power Ethanol can provide over petrol!


Flex fuel sensor housing is designed to neatly install into the factory BMW fuel hat location.


Flex Fuel Sensor Adapter also contains two 1/8 NPT ports that allow installation of an auxiliary Fuel Pressure sensor for vehicles that don’t come with an OEM one from the factory for future use. Depending on fitment, either port can be used.


Install the bootmod3 Flex Fuel Plug and Play Kit and flash your flex fuel enabled bootmod3 OTS MultiMap or Custom Map in minutes and you’re off to the races never worrying about alcohol/petrol blend % in your fuel tank. It does not get better or easier than this!


bootmod3 FlexFuel Plug and Play Kit:


Minutes to install at home as opposed to hours at a shop with car up on lift fabricating/cutting into factory fuel lines and splicing/cutting/pinning into OEM electrical

4+ hours in time/cost savings to get going on Flex Fuel as compared to most other kits that require making custom fuel lines, fittings, and custom wiring! 

Fully reversible/removable and back to stock without a trace in minutes

Custom 3-piece Aluminum-6061 Flex Fuel sensor adapter with built-in sensor bypass to allow for obstruction-free fuel flow made to fit in the vehicle factory fuel hat area below the rear seat

All connecting points are sealed with fuel-safe Viton O-rings

Flex Fuel Sensor Adapter housing provides additional 1/8 NPT ports for optional Fuel Pressure sensor addition to vehicles without a factory one for bootmod3 CustomROM v2 support

CANBUS Enabled Ethanol Content Analyzer (ECA) that integrates with bootmod3 CustomROM for complete and seamless conversion of your BMW to FlexFuel for bootmod3 Flex Fuel enabled OTS MultiMaps and custom tunes with your bootmod3 tuner of choice

Power/CANBus 4-wire plug-and-play harness

100% Fully Plug and Play harness to the BMW Fuel Controller connectors (EKP3) on S55, N55 vehicles

100% Fully Plug and Play harness on the BMW Body Domain Controller (BDC/FEM) connector on Gen1 F-series B48/B58

Continental Flex Fuel sensor 3-wire harness

Custom Aluminum-6061 CANBus Enclosure for the bootmod3 ECA board

Custom, kink-free teflon braided line allowing plug-and-play installation with the OEM fuel hat and factory 5/16” or 3/8” fuel feed line. No cutting or new lines required.

-6 AN fitting by Racetronix

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Fuel-It! Flex Fuel Kit - N54/N55 5 Series
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21242701
Part#: FFK-N5XB
In Stock
Sale - Save 4% $ 485.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 464.99 USD
Free Shipping on orders $49 and up
Sale - Save 4%
$ 485.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 464.99 USD
Free Shipping on orders $49 and up
This is a complete plug and play kit to install a Bluetooth ethanol sensor in your E-Series BMW. (Check compatibility for your platform below) This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgrade -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. This kit features a 0-5 volt analog output that integrates with the JB4, analog gauge, or any other ECU or tuner that supports 0-5 volt input. All of these kits utilize a custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. For your fuel line upgrade, choose the option that supports your current configuration. HPFP to the fuel tank: (Stock) This upgrade replaces both stock fuel lines with one upgraded continuous fuel line from the fuel tank to the HPFP and adds the ethanol sensor. Port Injection to the fuel tank: If you are running our port injection kit, this upgrade replaces the stock fuel lines from the tank to the engine bay, integrates the ethanol sensor and then utilizes a Y adapter to supply the HPFP and PI with fuel. Our custom fittings remove those tee's and extra fittings for a cleaner high flow setup. Non-Fuel-It! port injection to fuel tank: Choose this option if you are running a port injection kit that we did not manufacture or sell. This kit includes a longer 18" feedline from the Y to the port injection rail. You then cut the feed line to the length you need and install the included -6an female fitting or -6an female elbow to make the connection to your port injection rail. *These kits are available for off-road use only *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. *For the BMW N54 E-series JB4 platform connect the white wire to position #15 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *For the BMW N55 E-series JB4 platform connect the white wire to position #16 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *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.
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BM3 FlexFuel Kit - Fuel Hat Location - F97/F98 X3M X4M Pre-LCI ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bootmod3 - Corporate Logo
T#:31390587
Part#: BM3FFKTFH
In Stock
$ 599.00 USD
Free Shipping on orders $49 and up
$ 599.00 USD
Free Shipping on orders $49 and up
BM3 is proud to bring out this truly awesome product that makes getting the required Flex Fuel hardware on your BMW with incredible ease and minimal effort, in your own driveway. BM3's kit is entirely plug-and-play with the factory vehicle harness. No cutting or splicing of OEM wiring/connectors. It installs in minutes and can be removed without a trace on the car! BM3's team used SolidWorks to design a Flow Optimized Flex Fuel Sensor Adapter (FFSA) to ensure fuel flow is unobstructed and with no added pressure drop at full fuel pump flow from the fuel tank to your motor when our kit is installed. This is important when pushing the factory fuel system with all the power Ethanol can provide over petrol! Flex fuel sensor housing is designed to neatly install into the factory BMW fuel hat location. Flex Fuel Sensor Adapter also contains two 1/8 NPT ports that allow installation of an auxiliary Fuel Pressure sensor for vehicles that don’t come with an OEM one from the factory for future use. Depending on fitment, either port can be used. Install the BM3 Flex Fuel Plug and Play Kit and flash your flex fuel enabled BM3 OTS MultiMap or Custom Map in minutes and you’re off to the races never worrying about alcohol/petrol blend % in your fuel tank. It does not get better or easier than this! BM3 FlexFuel Plug and Play Kit: Minutes to install at home as opposed to hours at a shop with car up on lift fabricating/cutting into factory fuel lines and splicing/cutting/pinning into OEM electrical 4+ hours in time/cost savings to get going on Flex Fuel as compared to most other kits that require making custom fuel lines, fittings and custom wiring! Fully reversible/removable and back to stock without a trace in minutes Custom 3-piece Aluminum-6061 Flex Fuel sensor adapter with built-in sensor bypass to allow for obstruction free fuel flow made to fit in the vehicle factory fuel hat area below the rear seat All connecting points sealed with fuel safe Viton o-rings Flex Fuel Sensor Adapter housing provides additional 1/8 NPT ports for optional Fuel Pressure sensor addition to vehicles without a factory one for BM3 CustomROM v2 support CANBUS Enabled Ethanol Content Analyzer (ECA) that integrates with BM3 CustomROM for complete and seamless conversion of your BMW to FlexFuel for BM3 Flex Fuel enabled OTS MultiMaps and custom tunes with your BM3 tuner of choice Power/CANBus 4-wire plug and play harness 100% Fully Plug and Play harness to the BMW Fuel Controller connectors (EKP3) on S55, N55 vehicles 100% Fully Plug and Play harness on the BMW Body Domain Controller (BDC/FEM) connector on Gen1 F-series B48/B58 Continental Flex Fuel sensor 3-wire harness Custom Aluminum-6061 CANBus Enclosure for the BM3 ECA board Custom, kink-free teflon braided line allowing plug-and-play installation with the OEM fuel hat and factory 5/16” or 3/8” fuel feed line. No cutting or new lines required. -6 AN fitting by Racetronix NOTE: OEM FUEL HAT LOCATION KIT IS INTENDED FOR OEM FUEL PUMP AND ASSOCIATED WIRING. ANY VARIATIONS TO FUEL LINES OR FUEL PUMPS MAY NOT BE COMPATIBLE. USE THE ENGINE BAY INSTALLATION KIT WHERE AVAILABLE INSTEAD.
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Fuel-It! Bluetooth Flex Fuel Kit - B46/B48/B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21209854
Part#: FFK-B464858
Ships on Jul 27, 2026
Starting at $ 479.99 USD
Free Shipping on orders $49 and up
Starting at $ 479.99 USD
Free Shipping on orders $49 and up
If you're running E85 or ethanol mixes in your BMW, you need this kit! As many of you know the BMW motors can be very picky about how much ethanol you run to achieve peak performance but not run lean. Consequently, BMS have put together a kit enabling you to easily install an ethanol sensor with no permanent modifications needed. You will simply remove your low pressure fuel line in the engine bay and plug in our kit. It's a complete plug and play solution that utilizes our Bluetooth app to monitor your ethanol content. When you are ready to return to stock, you will simply remove the kit and re-install the stock fuel line. The complete kit includes the following: Genuine Continental ethanol sensor Fuel-It! Bluetooth Universal Analyzer 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 *For the 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. *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.
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Fuel-It! Flex Fuel Kit - F-Chassis S55 - Non BMS/FI PI
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21275564
Part#: FFK-S55-NFI
Ships on Jul 27, 2026
$ 609.99 USD
Free Shipping on orders $49 and up
If you are 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 S55 BMW. This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgraded -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. Includes both Bluetooth App & 5v analog output for JB4 or flash tuning. For your fuel line upgrade, choose the option that supports your current configuration. HPFP to the fuel tank: (Stock) This upgrade replaces both stock fuel lines with one upgraded continuous fuel line from the fuel tank to the HPFP and adds the ethanol sensor. Port Injection to the fuel tank: If you are running our port injection kit, this upgrade replaces the stock fuel lines from the tank to the engine bay, integrates the ethanol sensor and then utilizes a Y adapter to supply the HPFP and PI with fuel. Our custom fittings remove those tee's and extra fittings for a cleaner high flow setup. Non-Fuel-It! port injection to fuel tank: Choose this option if you are running a port injection kit that we did not manufacture or sell. This kit includes a longer 18" feedline from the Y to the port injection rail. You then cut the feed line to the length you need and install the included -6an female fitting or -6an female elbow to make the connection to your port injection rail. All of these kits utilize the BMS custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. *For the BMW F-series JB4 platform connect the white wire to position #16 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *These kits are available for off-road use only *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.
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Fuel-It! Flex Fuel Kit - G2x/G3x/G4x B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21209864
Part#: GB58BFFK
Ships on Jul 27, 2026
$ 479.99 USD
Free Shipping on orders $49 and up
The complete kit with Bluetooth ECA includes the following: Genuine Continental® ethanol sensor Two stainless steel braided fuel lines with black nylon sheathing to protect your other engine bay components 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 *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. *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.
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Fuel-It! Bluetooth FLEX FUEL KIT For The S63TU 2012-2016 F10 BMW M5 &...
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Fuel-It! - Corporate Logo
T#:16840517
Part#: FFKS63TUFXM
Ships on Jul 27, 2026
$ 479.99 USD
Free Shipping on orders $49 and up
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) *For the BMW F-series JB4 platform connect the white wire to position #16 on the JB4 25 pin harness. Select WMI page bit 1 to enable. *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.
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BM3 FlexFuel Kit - Engine Bay Location - F97/F98 X3M X4M Pre-LCI ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bootmod3 - Corporate Logo
T#:31092490
Part#: BM3FFKT
Ships in 10 Business Days
8% off MSRP $ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
BM3 is proud to bring out this truly awesome product that makes getting the required Flex Fuel hardware on your BMW with incredible ease and minimal effort, in your own driveway. BM3's kit is entirely plug-and-play with the factory vehicle harness. No cutting or splicing of OEM wiring/connectors. It installs in minutes and can be removed without a trace on the car! BM3's team used SolidWorks to design a Flow Optimized Flex Fuel Sensor Adapter (FFSA) to ensure fuel flow is unobstructed and with no added pressure drop at full fuel pump flow from the fuel tank to your motor when our kit is installed. This is important when pushing the factory fuel system with all the power Ethanol can provide over petrol! Flex fuel sensor housing is designed to neatly install into the factory BMW fuel hat location. Flex Fuel Sensor Adapter also contains two 1/8 NPT ports that allow installation of an auxiliary Fuel Pressure sensor for vehicles that don’t come with an OEM one from the factory for future use. Depending on fitment, either port can be used. Install the BM3 Flex Fuel Plug and Play Kit and flash your flex fuel enabled BM3 OTS MultiMap or Custom Map in minutes and you’re off to the races never worrying about alcohol/petrol blend % in your fuel tank. It does not get better or easier than this! BM3 FlexFuel Plug and Play Kit: Minutes to install at home as opposed to hours at a shop with car up on lift fabricating/cutting into factory fuel lines and splicing/cutting/pinning into OEM electrical 4+ hours in time/cost savings to get going on Flex Fuel as compared to most other kits that require making custom fuel lines, fittings and custom wiring! Fully reversible/removable and back to stock without a trace in minutes Custom 3-piece Aluminum-6061 Flex Fuel sensor adapter with built-in sensor bypass to allow for obstruction free fuel flow made to fit in the vehicle factory fuel hat area below the rear seat All connecting points sealed with fuel safe Viton o-rings Flex Fuel Sensor Adapter housing provides additional 1/8 NPT ports for optional Fuel Pressure sensor addition to vehicles without a factory one for BM3 CustomROM v2 support CANBUS Enabled Ethanol Content Analyzer (ECA) that integrates with BM3 CustomROM for complete and seamless conversion of your BMW to FlexFuel for BM3 Flex Fuel enabled OTS MultiMaps and custom tunes with your BM3 tuner of choice Power/CANBus 4-wire plug and play harness 100% Fully Plug and Play harness to the BMW Fuel Controller connectors (EKP3) on S55, N55 vehicles 100% Fully Plug and Play harness on the BMW Body Domain Controller (BDC/FEM) connector on Gen1 F-series B48/B58 Continental Flex Fuel sensor 3-wire harness Custom Aluminum-6061 CANBus Enclosure for the BM3 ECA board Custom, kink-free teflon braided line allowing plug-and-play installation with the OEM fuel hat and factory 5/16” or 3/8” fuel feed line. No cutting or new lines required. -6 AN fitting by Racetronix
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A90 MKV B58 Supra Fuel-It! Flex Fuel Kit
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Fuel-It! - Corporate Logo
T#:21275577
Part#: FFK-B58S-FK
Ships on Jul 27, 2026
$ 479.99 USD
Free Shipping on orders $49 and up

A90 MKV B58 Supra Fuel-It! Flex Fuel Kit is the ultimate upgrade for monitoring and managing your Toyota Supra’s ethanol content in real-time. This complete kit, offered by Turner Motorsport, allows you to know your exact ethanol content through the Fuel-It! or JB4 mobile app on your smartphone or tablet. It’s perfect for those looking to maximize performance by running ethanol blends, providing you with precise data to make informed decisions.

This kit includes everything you need for installation, featuring a genuine Continental® ethanol sensor, stainless steel braided fuel lines with black nylon sheathing, a Fuel-It! Bluetooth analyzer, and a plug-and-play harness. It also supports both Bluetooth App and 5v analog output for JB4 or flash tuning.

  • Real-Time Monitoring: Instantly view ethanol content on your smartphone or tablet via the Fuel-It! or JB4 app.
  • Comprehensive Kit: Includes a genuine Continental® ethanol sensor, Fuel-It! Bluetooth analyzer, and more.
  • Durable Construction: Stainless steel braided fuel lines with black nylon sheathing protect engine bay components.
  • Plug-and-Play Installation: Simplified installation with a plug-and-play harness.
  • Bluetooth and Analog Output: Supports both Bluetooth connectivity and 5v analog output for JB4 or flash tuning.
  • Optimized Performance: Perfect for those looking to maximize power by running ethanol blends.
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Fuel-It! Flex Fuel Kit - B58 G29 Z4
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21275568
Part#: FFK-G29Z4-CK
Ships on Jul 27, 2026
$ 479.99 USD
Free Shipping on orders $49 and up
If you are 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 B58 powered G29 Z4. This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgraded -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. Includes both Bluetooth App & 5v analog output for JB4 or flash tuning. All of these kits utilize the BMS custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. For the G29 Z4 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. *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.
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Fuel-It! Flex Fuel Kit - F-Chassis S55 - BMS/FI PI
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21275563
Part#: FFK-S55-FIP
Ships on Jul 27, 2026
$ 589.99 USD
Free Shipping on orders $49 and up
If you are 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 S55 BMW. This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgraded -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. Includes both Bluetooth App & 5v analog output for JB4 or flash tuning. For your fuel line upgrade, choose the option that supports your current configuration. HPFP to the fuel tank: (Stock) This upgrade replaces both stock fuel lines with one upgraded continuous fuel line from the fuel tank to the HPFP and adds the ethanol sensor. Port Injection to the fuel tank: If you are running our port injection kit, this upgrade replaces the stock fuel lines from the tank to the engine bay, integrates the ethanol sensor and then utilizes a Y adapter to supply the HPFP and PI with fuel. Our custom fittings remove those tee's and extra fittings for a cleaner high flow setup. Non-Fuel-It! port injection to fuel tank: Choose this option if you are running a port injection kit that we did not manufacture or sell. This kit includes a longer 18" feedline from the Y to the port injection rail. You then cut the feed line to the length you need and install the included -6an female fitting or -6an female elbow to make the connection to your port injection rail. All of these kits utilize the BMS custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. *For the BMW F-series JB4 platform connect the white wire to position #16 on the JB4 25 pin harness. Select WMI Ethanol Setup option 1 to enable pin location 15/16 flex fuel input. *These kits are available for off-road use only *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.
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Fuel-It! Flex Fuel Kit - B58 G05
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fuel-It! - Corporate Logo
T#:21275576
Part#: FFK-B58X-FK
Ships on Jul 27, 2026
$ 349.99 USD
Free Shipping on orders $49 and up
Know your exact ethanol content in real-time via the Fuel-It! or JB4 mobile app on your smartphone or tablet. The complete kit includes the following: Genuine Continental ethanol sensor Fuel-It! Bluetooth Universal Analyzer One stainless steel braided fuel line with black nylon sheathing to protect your other engine bay components Proprietary custom billet fitting for plug and play OEM integration One custom wiring harness 1 tube of SuperLube® for hose adapter install Bluetooth Model Supports stand-alone Bluetooth operation with the Fuel-It! app *For the 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. *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.
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