Fuel-It! BMW M340i Bluetooth/CANflex Flex Fuel Kits for the G-Chassis Gen 3 B58 (B58TU2)
12th Mar 2025
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Optimize your BMW’s performance with the Fuel-It Bluetooth/CANflex Flex Fuel Kit, designed for 2025+ BMW M340i (G20/G21) with the Gen 3 B58TU2 engine. Running E85 or ethanol blends requires precise monitoring to maintain optimal performance without running lean. This plug-and-play solution allows you to track ethanol content in real-time through the Fuel-It! or JB4 app while ensuring a hassle-free installation with no permanent modifications.
Key Benefits:
- Real-Time Ethanol Monitoring – View exact ethanol content on your smartphone or tablet via the Fuel-It! or JB4 app.
- Optimized Performance – Helps you run the ideal ethanol mix for maximum power and safety.
- Seamless Integration – Works with JB4, MHD, EcuTek, and future flash tuning solutions.
- Plug-and-Play Installation – Installs quickly by replacing the low-pressure fuel line—easily reversible.
- Premium Components – Includes braided stainless steel fuel lines, billet fittings, and a plug-and-play harness.
- Multiple Kit Options – Choose from Bluetooth, CANbus PnP, or CANbus Universal harness versions.
Kit Options:
1. Complete Kit with Bluetooth ECA (Standalone Bluetooth Monitoring)
✔ Genuine Continental® ethanol sensor
✔ Stainless steel braided fuel line with black nylon sheathing for durability
✔ Proprietary custom billet fitting for seamless OEM integration
✔ Plug-and-play Bluetooth ECA for smartphone ethanol monitoring
✔ Bluetooth harness & power adapter
✔ Fuel-It! app support (iOS & Android)
2. Complete Kit with CANbus ECA & Plug-and-Play Harness (COMING SOON)
✔ CANflex LED ECA to display real-time ethanol content
✔ CANflex Plug-and-Play harness for automatic transmission BMW Gen 3 B58
✔ JB4, MHD, ECUtek compatibility (BM3 users require the universal harness)
3. Complete Kit with CANbus ECA & Universal Harness (For advanced tuning setups)
✔ CANflex LED ECA with real-time ethanol display
✔ Legacy 5V output for JB4 integration
✔ Universal CANbus harness for compatibility with future flash tuning updates
Fitment:
- 2025+ G20/G21 BMW M340i (Gen 3 B58TU2) including xDrive
For JB4 users, connect the white wire to position #4 on the JB4 25-pin harness. Enable flex fuel input using WMI Ethanol Setup option 0.
Note: Ethanol sensors measure the absence of gasoline, meaning contamination may cause artificially high ethanol readings.
Upgrade your BMW’s fuel system with the Fuel-It Bluetooth/CANflex Flex Fuel Kit and ensure peak performance with precise ethanol monitoring.