Description
Run E85 and ethanol-blended fuels with greater confidence using the BMS CANflex Flex Fuel Ethanol Content Sensor Kit for BMW G-Chassis vehicles equipped with B46 and B48 engines. This complete plug-and-play flex fuel system accurately measures ethanol concentration in real time and provides multiple ways to monitor and transmit fuel-content data to compatible tuning platforms.
The system uses a genuine Continental® ethanol content sensor to measure the actual ethanol concentration in your fuel. Ethanol content can be monitored directly through the integrated CANflex LED display, the BMS CANflex Bluetooth app, the Fuel-It! Bluetooth app, or through CANbus and 5V analog outputs for compatible tuning applications.
Designed for a clean OEM-style installation, the kit connects to the vehicle's low-pressure fuel system without requiring permanent modifications. Installation takes approximately 30 minutes on compatible applications. When returning the vehicle to its stock configuration, the flex fuel system can be removed and the factory fuel line reinstalled.
Real-Time Ethanol Content Monitoring
Ethanol concentration can vary significantly between different fuel sources and blends. Monitoring the actual ethanol content helps provide the fuel-content information needed for compatible tuning systems and gives drivers a convenient way to verify the fuel mixture in the tank.
The BMS CANflex ECA provides multiple methods of accessing ethanol data:
- CANbus: User-selectable CANbus addressing for supported MHD, bootmod3 (BM3), EcuTek, and JB4 applications.
- Bluetooth: Monitor ethanol content from a compatible iPhone, Android smartphone, or tablet using the BMS CANflex or Fuel-It! mobile app.
- Integrated LED display: Quickly view current ethanol content directly from the CANflex head unit.
- 5V analog output: Provides legacy support for compatible JB4 and flash-tuning applications.
Plug-and-Play OEM Integration
The kit is engineered for a straightforward installation using the vehicle's existing low-pressure fuel line. Simply remove the factory low-pressure fuel line in the engine bay and install the supplied flex fuel components.
The included custom billet fitting provides a clean OEM-style connection, while the stainless steel braided fuel line with black nylon protective sheathing helps protect surrounding engine-bay components from contact and abrasion.
No permanent modifications to the vehicle are required. When you want to return the vehicle to its original configuration, simply remove the flex fuel kit and reinstall the factory fuel line.
BMS CANflex ECA Kit
The complete BMS CANflex configuration includes a genuine Continental® ethanol sensor and CANflex Ethanol Content Analyzer (ECA), providing several options for monitoring and tuning integration.
BMS CANflex Kit Includes
- Genuine Continental® ethanol content sensor
- BMS CANflex LED Ethanol Content Analyzer (ECA)
- Stainless steel braided fuel line with black nylon protective sheathing
- Proprietary custom billet fitting for OEM-style integration
- Custom wiring harness
- Super Lube® for hose adapter installation
- 5V analog output for legacy JB4 integration
- Universal CANbus harness for compatible flash-tuning applications
- Optional plug-and-play harness
- BMW/Supra accessory harness for S58/B58 applications, where applicable
The custom fitting also simplifies future port-injection integration. The included 1/8-inch NPT fitting can be removed and replaced with an optional port-injection line when required.
Fuel-It! Bluetooth ECA Kit
A Fuel-It! Bluetooth ECA configuration is also available for customers who prefer smartphone-based ethanol monitoring.
Fuel-It! Kit Includes
- Genuine Continental® ethanol content sensor
- Stainless steel braided fuel line with protective black nylon sheathing
- Custom billet OEM-style fitting
- Fuel-It! Bluetooth ethanol analyzer
- Bluetooth connectivity for iPhone and Android devices
- 5V analog output for compatible JB4 or flash-tuning applications
The Fuel-It! mobile application is required to use the Bluetooth monitoring functionality.
Harness & Tuning Integration
The system is offered with plug-and-play and universal harness configurations to accommodate different BMW platforms and tuning applications.
Important: Manual transmission vehicles and BM3 applications require the universal harness with posi-tap connections for CANbus integration.
The CANflex system supports user-selectable CANbus addressing for compatible MHD, BM3, EcuTek, and JB4 applications. Compatibility depends on the specific ECU, tuning platform, software version, and vehicle configuration.
Vehicle Fitment
BMW G-Chassis B46/B48 Applications
- 2022+ BMW 220i / 230i – G42, B48
- 2019+ BMW 330i / 330e – G20/G21, B46/B48
- 2021+ BMW 430i – G22/G23/G26, B48
- 2017–2023 BMW 530i / 530e – G30, B46/B48
Important: Always verify the exact vehicle, engine, model year, transmission, and tuning platform before ordering.
JB4 Installation Configuration
For compatible BMW G-Series JB4 applications:
- Connect the white or blue wire to position #4 on the JB4 25-pin harness.
- Select WMI Ethanol Setup Option 0 to enable the flex fuel input at the applicable pin location.
Refer to the specific JB4 installation instructions for your vehicle and configuration before making electrical connections.
Flexible Component Configuration
The individual components can also be purchased a la carte, allowing customers to configure the system according to their specific application.
For the complete flex fuel system to function properly, the required core components are:
- Fuel lines
- Ethanol sensor
- Ethanol analyzer
Key Features
- Real-time ethanol content monitoring
- Designed for BMW B46/B48 G-Chassis applications
- Genuine Continental® ethanol content sensor
- BMS CANflex LED display
- Bluetooth smartphone and tablet monitoring
- Compatible with BMS CANflex and Fuel-It! apps
- CANbus output with selectable addressing
- 5V analog output for legacy applications
- Compatible with supported JB4, MHD, BM3, and EcuTek applications
- Plug-and-play OEM-style fuel-line integration
- No permanent vehicle modifications required
- Stainless steel braided fuel line
- Protective black nylon fuel-line sheathing
- Custom billet fitting
- Port-injection-ready 1/8-inch NPT connection
- Approximately 30-minute installation
- Plug-and-play and universal harness options
- Individual components available separately
Important Compatibility Notes
- Verify vehicle and engine compatibility before ordering.
- Manual transmission and BM3 applications require the universal harness with CANbus posi-tap connections.
- JB4 installation requires the specified harness pin configuration.
- Bluetooth functionality requires the applicable Fuel-It! or BMS CANflex mobile application.
- Tuning integration depends on the specific ECU, tuning platform, and software configuration.
- The complete flex fuel system must include the required fuel lines, ethanol sensor, and analyzer.
The BMS CANflex & Fuel-It! Flex Fuel Ethanol Content Sensor Kit provides BMW B46/B48 owners with a clean, reversible solution for monitoring E85 and ethanol-blended fuel. With real-time ethanol measurement, Bluetooth connectivity, an integrated LED display, CANbus integration, and 5V analog output, the system provides versatile fuel-content monitoring for street, performance, and advanced tuning applications.
