Electronics for BMW 3 Series F34 (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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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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Burger Motorsports - Corporate Logo
T#:49822568
Part#: JB4PB58FFAOH
In Stock
New Item
$ 49.00 USD
Free Shipping on orders $49 and up
Take your B58 or S58 build further with the JB4PRO Flex Fuel Add-On Harness—a simple, plug-and-play way to add an ethanol sensor and optional fuel pressure sensor to your JB4PRO setup. Keep your install clean, your wiring organized, and your tune dialed to match every fuel blend in the tank. Why it matters: Plug & Play: Connects directly to your JB4PRO—no cutting or splicing required. Sensor Ready: Supports ethanol and fuel pressure sensors for precise, real-time fueling adjustments. Clean, Safe Installation: Includes a 12 V adapter and inline fuse for hassle-free integration. How it works: This harness links your JB4PRO tuner to your flex fuel hardware. It’s not a complete flex fuel kit—you still need a compatible ethanol sensor—but it gives your JB4PRO the accurate readings it needs to adjust timing, boost, and fueling for E30, E50, or E85 blends.
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Fuel-It! - Corporate Logo
T#:21209854
Part#: FFK-B464858
Ships on Aug 6, 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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