Electronics for BMW 3 Series F31 (2014+)

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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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Upgraded Fuel Pump Control Module - Dual Ball Bearing Fan - EKPM3 ...
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Arc Terminator - Corporate Logo
T#:28304531
Part#: EKP-HW06-F-SF
In Stock
$ 209.99 USD
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Arc Terminator now offers upgraded EKMP3 Fuel Pump Control Modules featuring a 22 Amp INCREASE in maximum current capacity over an OEM EKPM3. This allows for more current to be supplied to your low-pressure fuel pump (LPFP) without risking thermal overload, which often leads to your car shutting down. This means that you won't have to worry about being stranded on the side of the road while waiting for your EKP module to cool down, especially when you've installed a large low-pressure fuel pump such as a Walbro 525lph. How does the integrated automatic cooling work? The integrated automatic cooling works by us installing a thermal activation switch directly onto the new half-bridge IC. When the half-bridge IC reaches 50°C, the 40mm fan will turn on and keep running until the IC is below 50°C or until the EKMP3 stops receiving power. Can I run more than 1 low-pressure fuel pump off of this module? No. We do not recommend that you use more than one low-pressure fuel pump with any EKP module due to the factory wiring supplying power to the EKP Module is only 12 gauge, which is not rated for the type of power demands that two low-pressure fuel pumps would require.
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BMW F Chassis Upgraded Fuel Pump Control Module - Noctua Fan - EKPM3 ...
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This service will not work for M-Cars or any B-Series motors
Arc Terminator - Corporate Logo
T#:28304534
Part#: EKP-HW06-F-NF
In Stock
$ 239.99 USD
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Arc Terminator now offers upgraded EKMP3 Fuel Pump Control Modules featuring a 22 Amp INCREASE in maximum current capacity over an OEM EKPM3. This allows for more current to be supplied to your low-pressure fuel pump (LPFP) without risking thermal overload, which often leads to your car shutting down. This means that you won't have to worry about being stranded on the side of the road while waiting for your EKP module to cool down, especially when you've installed a large low-pressure fuel pump such as a Walbro 525lph. Includes 40mm Noctua Silent Fan! How does the integrated automatic cooling work? The integrated automatic cooling works by us installing a thermal activation switch directly onto the new half-bridge IC. When the half-bridge IC reaches 50°C, the 40mm fan will turn on and keep running until the IC is below 50°C or until the EKMP3 stops receiving power. Can I run more than 1 low-pressure fuel pump off of this module? No. We do not recommend that you use more than one low-pressure fuel pump with any EKP module due to the factory wiring supplying power to the EKP Module is only 12 gauge, which is not rated for the type of power demands that two low-pressure fuel pumps would require.
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BMW B46 B48 Motiv ReFlex Plug-n-Play Ethanol Sensor Harness
For Vehicles With Motiv ReFlex Unit Currently Installed Only
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Motiv Motorsports - Corporate Logo
T#:22723690
Part#: 101-0212
In Stock
$ 49.00 USD
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$ 49.00 USD
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BMW B46 B48 Motiv ReFlex Plug-n-Play Ethanol Sensor Harness simplifies the integration of an ethanol content sensor into your BMW's Re|Flex system. This harness is designed to enhance your vehicle's performance by scaling the sequential port injection based on real-time ethanol content, eliminating the need for manual adjustments. Key benefits include:

  • Effortless Installation: Plug-n-play design makes it easy to connect an ethanol content sensor without extensive modifications.
  • Real-Time Adjustments: Allows for automatic scaling of port injection based on real-time ethanol content, optimizing engine performance.
  • Seamless Integration: For CANbus integrated vehicles, it facilitates integration with the factory DME/ECU (pending feature release by tuning platforms).
  • No Manual Flashes Required: Removes the need for ground disconnection or map switching on your port injection controller.

Please note that the ethanol sensor is not included with this harness.

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ReFlex+ Install Harness - Flying Lead
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Motiv Motorsports - Corporate Logo
T#:29201083
Part#: 900.1016
In Stock
$ 95.00 USD
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A flying lead harness is a wiring harness that is unterminated at one end and has an excess length of wire so that installation can be customized by the end user. That makes this section of the ReFlex+ Install Harness truly universal. On one end, this harness has an 8-pin connector to plug into any one of our ReFlex+ Main Injector Harnesses. The other end of each wire is unterminated and will be connected to the appropriate sensor, ground, or power supply based on installation instructions. Each harness has a wire for: Switched +12v Input w/ inline fuse +5v Input Ground Can HI Can Lo Cam Sensor Signal Crank Sensor Signal Map Sensor Signal
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3/8" Quick Disconnect Adapter With 1/8" NPT Port
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Motiv Motorsports - Corporate Logo
T#:29500156
Part#: 200.1105
In Stock
$ 24.00 USD
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Quick disconnect adapters (QDA) are commonly used to adapt different components into vehicle fuel systems without requiring permanent modification. These adapters are machined from high-grade aluminum and anodized for corrosion resistance. QDAs incorporate Viton© o-rings which are compatible with most types of fuel, solvents and oils. QDAs maintain a reliable leak-proof seal under normal fuel injection system operating pressures. This particular QDA is sized perfectly to adapt right between the fuel line you were going to connect to your ethanol sensor. 3/8" (9.5mm) female quick disconnect 3/8" (9.5mm) male quick disconnect 1/8" Female pipe thread port * Viton© o-rings Crecent-lock system E-85 compatible Black anodized aluminum
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ReFlex Lite Injector Harness - Inline-4
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Motiv Motorsports - Corporate Logo
T#:29234303
Part#: 900.1012
Ships in 4 Business Days
$ 140.00 USD
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Required when installing a Motiv ReFlex Lite to your inline-4 powered BMW! Includes x4 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!

ReFlex Lite Injector Harness - Inline-6
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Motiv Motorsports - Corporate Logo
T#:29234311
Part#: 900.1013
Ships in 4 Business Days
$ 155.00 USD
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Required when installing a Motiv ReFlex Lite to your inline-6 powered BMW! Includes x6 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!
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 - N20/N26 F Chassis
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Fuel-It! - Corporate Logo
T#:21275574
Part#: FFK-N20/6F-FK
In Stock
$ 369.99 USD
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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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Fuel-It! Bluetooth Flex Fuel Kit - B46/B48/B58
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Fuel-It! - Corporate Logo
T#:21209854
Part#: FFK-B464858
Ships on Jul 15, 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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Black Market Parts Universal Fuel Pump Wiring Kit
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Precision Raceworks - Corporate Logo
T#:38195421
Part#: 601-0054
Ships in 5 Business Days
$ 14.99 USD
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The Black Market Parts Universal Fuel Pump Wiring Kit is a one-stop shop solution for anyone looking to add an additional fuel pump to their fuel tank. This compact kit provides 6 inches of 100% E85 compliant 12 gauge wiring so you don't have to buy complete spools of wire just to get the little wire you need to extend the pump harness. The kit also includes all hardware for bulk head style pass-through for power used by pump manufacturers around the world. Full stainless bulk head power posts make it easy to add pass-through power to any fuel pump
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