BMW M340i Bluetooth/CANflex Flex Fuel Kits for the G-Chassis Gen 3 B58 (B58TU2)
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 Gen 3 B58 equipped 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, we 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.
All of our complete kits include the following:
- Genuine Continental® ethanol sensor
- 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
- One tube of SuperLube® for hose adapter install
Complete Kit with CANbus ECA and Plug and Play Harness includes: (COMING SOON)
- Our new CANflex LED ECA to display current ethanol content
- CANflex Plug and Play harness
-
Note: this harness is a plug and play option with the following requirements.
- It is only compatible with the BMW GEN3 B58 platforms with automatic transmissions.
- You must be running a JB4, MHD, ECUtek, or similar tune
- BM3 is not compatible with the PnP harness and requires our universal harness!
Complete Kit with CANbus ECA and Universal Harness includes:
- Our new CANflex LED ECA to display current ethanol content
- Legacy 5V output for JB4 integration
- Universal CANbus harness for use with future flash tuning integration
Complete Kit with Fuel-It! Bluetooth ECA
- Our Bluetooth ECA
- Bluetooth harness and plug and play power adapter
- Bluetooth Model Supports stand-alone Bluetooth operation with the Fuel-It! app
- Bluetooth (iPhone or Android app must be downloaded to use this feature)
- If you are using an Apple product the app can be found by clicking here
- If you are using an Android product the app can be found by clicking here
Compatible platforms for the B58TU2 (Gen 3 B58) motors:
BMW 3 Series
• 2025+ G20 G21 B58 GEN 3 BMW M340i including xDrive
*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.
*Free shipping in USA on complete kits only.
