Running E85 or ethanol-blended fuel can be an effective way to support a performance-oriented engine calibration, but ethanol content is not always consistent from one fill-up to the next. The actual percentage of ethanol in the fuel can vary depending on the fuel source, seasonal formulation, and how much fuel remains in the tank before refueling.

For Hyundai Elantra N and Veloster N owners using ethanol blends, knowing the actual ethanol content can therefore be valuable when monitoring a modified vehicle.

The Burger Tuning BMS CANFlex Flex Fuel Ethanol Content Sensor Kit provides a dedicated solution for monitoring ethanol content in real time on compatible Hyundai Elantra N and Veloster N 2.0T applications. Combining a genuine Continental ethanol sensor with a Bluetooth-enabled CANbus interface and integrated display, the CANFlex system makes it possible to monitor fuel composition through multiple data interfaces.

The system is also designed for integration with compatible JB4 tuning systems, allowing ethanol content information to be accessed through the JB4PRO or CANFlex smartphone and tablet app.

Real-Time Ethanol Content Monitoring

The main purpose of a flex fuel sensor is straightforward: determine how much ethanol is actually present in the fuel being supplied to the engine.

Fuel marketed as E85 does not necessarily contain exactly 85% ethanol at all times. Ethanol content can vary, which means relying solely on the fuel label does not provide the same information as directly measuring the fuel.

The CANFlex system uses a genuine Continental ethanol content sensor to measure the ethanol percentage in the fuel.

This information can then be accessed through the CANFlex system's available interfaces, giving the driver real-time visibility into fuel composition.

For enthusiasts who regularly switch between pump gasoline, ethanol blends, and E85, this provides a much more practical way to keep track of what is actually in the tank.

Designed for the Hyundai N 2.0T Platform

The BMS CANFlex kit is specifically configured for the Hyundai Elantra N and Veloster N 2.0T.

These cars have become popular platforms for enthusiasts looking to extract additional performance from the turbocharged 2.0L engine, and fuel quality becomes an increasingly relevant consideration as modifications and tuning are introduced.

The CANFlex system provides a dedicated way to monitor ethanol content without requiring the driver to manually test fuel samples every time the vehicle is refueled.

The application covers both manual and automatic/DCT configurations where specified, making it suitable for a broad range of Hyundai N performance builds.

Genuine Continental Ethanol Sensor

At the heart of the CANFlex system is a genuine Continental ethanol content sensor.

The sensor continuously analyzes the fuel flowing through it and determines the ethanol concentration. This measured information is then communicated to the CANFlex electronics for display and integration.

Using a dedicated ethanol sensor provides a more direct measurement of fuel composition than estimating ethanol percentage based on the type of fuel purchased.

For vehicles operating on varying ethanol blends, this can provide useful information when evaluating fuel consistency and monitoring the conditions under which a particular tune is being used.

BMS CANFlex ECA

The BMS CANFlex ECA serves as the interface between the ethanol sensor and the vehicle's available monitoring systems.

The compact unit combines several functions into a single system, including:

• Ethanol content analysis
• Bluetooth connectivity
• CANbus integration
• Integrated LED/LCD display functionality
• 5V output for legacy applications

This allows the CANFlex system to function as more than a standalone ethanol sensor. It becomes an integrated monitoring solution that can communicate ethanol-content information through supported vehicle and tuning interfaces.

Bluetooth Connectivity and Smartphone Monitoring

One of the advantages of the CANFlex system is its Bluetooth connectivity.

Compatible users can access ethanol-content information through the JB4PRO or CANFlex smartphone/tablet app, providing a convenient way to monitor fuel composition without relying exclusively on the physical display.

This is particularly useful when making changes to a vehicle's setup or simply checking ethanol content during normal driving.

Having the information available digitally also makes it easier to monitor fuel composition alongside other vehicle data supported by the connected tuning system.

CANbus Integration with JB4

The CANFlex system is designed for integration with compatible JB4 tuning systems, allowing ethanol content information to become part of the vehicle's broader tuning and monitoring environment.

CANbus communication allows electronic systems within the vehicle to exchange data, and the CANFlex interface uses this capability to make ethanol-content information available to supported systems.

For JB4-equipped Hyundai N vehicles, this provides a more seamless approach to monitoring ethanol content rather than relying on a completely separate external gauge or testing procedure.

The result is an integrated solution that fits naturally into a performance-oriented JB4 setup.

Built-In Display for Immediate Feedback

In addition to Bluetooth and CANbus connectivity, the CANFlex ECA features an integrated display for direct access to ethanol-content information.

This provides an immediate reference point without requiring a smartphone or tablet.

The system also includes a CAN LED silicone cover, adding protection and finishing to the integrated LED component.

Having multiple ways to access the same ethanol-content information gives the system flexibility depending on how the vehicle is being used.

5V Output for Legacy Applications

The BMS CANFlex system also provides a 5V output for legacy applications.

This allows the ethanol-content signal to be made available for compatible systems that rely on a 5V input rather than CANbus communication.

For owners incorporating the CANFlex system into an existing performance setup, this additional output can provide greater flexibility when integrating the ethanol sensor with compatible legacy equipment.

Complete Installation Kit

The CANFlex package is supplied as a complete kit rather than requiring the customer to source the major installation components separately.

Included hardware consists of:

• Genuine Continental ethanol sensor
• BMS Bluetooth CANFlex ECA with LCD display
• Custom billet fittings
• Steel-braided fuel line
• 3/8-inch billet fitting
• 4-foot custom extension harness
• BMS CANFlex Bluetooth app
• CAN LED silicone cover
• Super Lube®

The included components are designed to work together as a complete flex fuel monitoring system for the specified Hyundai applications.

Custom Billet Fittings and Braided Fuel Line

Fuel-system components require appropriate fittings and lines capable of handling their intended application.

The CANFlex kit includes custom billet fittings, a 3/8-inch billet fitting, and steel-braided fuel line to facilitate integration of the ethanol sensor into the fuel system.

The included fittings and line help eliminate the need to assemble a completely custom sensor installation from individual components.

The package also includes Super Lube®, which can be used as specified during installation to assist with the supplied fittings and connections.

Approximately 30-Minute Installation

The CANFlex system is designed with installation simplicity in mind, with an approximate installation time of 30 minutes for the specified application.

The kit includes a 4-foot custom extension harness, helping provide the necessary wiring reach for integration with the vehicle and compatible JB4 equipment.

As with any component installed into a fuel system, care should be taken during installation to ensure all fuel connections are correctly secured and free from leaks before the vehicle is returned to normal operation.

Elantra N JB4 Installation Configuration

For 2022+ Hyundai Elantra N vehicles using a JB4, the CANFlex installation includes a specific connection and configuration procedure.

The blue wire should be connected to position #16 on the JB4 25-pin harness.

The JB4 configuration should then be set to:

WMI Ethanol Setup — Option 0

Following the specified wiring and configuration procedure allows the CANFlex system to communicate correctly with the compatible JB4 setup.

Owners should follow the supplied installation instructions when completing the installation rather than relying solely on general wiring information.

Useful for E85 and Ethanol Blends

The CANFlex system is designed specifically for vehicles using E85 and ethanol fuel blends.

For an enthusiast switching between different fuel types, the ability to see ethanol content in real time can make fuel management considerably more transparent.

Instead of assuming that the fuel in the tank contains a particular ethanol percentage, the CANFlex system provides measured information from the vehicle's fuel system.

This can be especially useful when the vehicle is tuned around ethanol-blended fuel, where knowing the actual fuel composition can be an important part of understanding the conditions under which the engine is operating.

Supporting a More Informed Tuning Setup

Ethanol content is one of several variables that can influence the operating conditions of a performance engine.

When a vehicle uses ethanol blends, knowing the actual ethanol percentage provides additional information that can be considered alongside boost pressure, air-fuel ratio, ignition timing, intake temperatures, and other available engine data.

The CANFlex system does not replace proper calibration or professional tuning, but it provides an additional data point that can help the owner understand the fuel being used.

For enthusiasts who take a data-driven approach to modifying their Hyundai N, this additional visibility can be particularly useful.

Elantra N and Veloster N Compatibility

The BMS CANFlex Flex Fuel Ethanol Content Sensor Kit is designed for the following Hyundai applications.

2022+ Hyundai Elantra N 2.0T

Compatible transmissions include:

• 6-speed manual transmission
• 8-speed DCT transmission

2019–2022 Hyundai Veloster N 2.0T

Compatible transmissions include:

• 6-speed manual transmission
• 2021–2022 8-speed DCT transmission

Always verify the exact vehicle configuration before ordering and follow the specified installation procedure for the relevant application.

Built for Performance-Oriented Hyundai Builds

The Elantra N and Veloster N have strong appeal among enthusiasts because they combine a turbocharged engine with a chassis designed for performance driving.

As modifications become more extensive, fuel monitoring can become increasingly important.

The BMS CANFlex system adds a dedicated ethanol-content measurement capability without requiring the owner to manually test fuel after every fill-up.

Its combination of a genuine Continental sensor, Bluetooth connectivity, CANbus integration, integrated display, and JB4 compatibility makes it a comprehensive option for Hyundai N owners who regularly use ethanol fuel blends.

Key Features of the BMS CANFlex Flex Fuel Sensor

• Complete flex fuel ethanol content monitoring kit
• Designed for Hyundai Elantra N and Veloster N 2.0T
• Genuine Continental ethanol content sensor
• Real-time ethanol percentage monitoring
• BMS Bluetooth CANFlex ECA
• Integrated LCD/LED display
• Bluetooth connectivity
• CANbus integration
• Compatible with supported JB4 tuning systems
• Monitoring through JB4PRO or CANFlex app
• 5V output for legacy applications
• Plug-and-play CAN integration
• Custom billet fittings
• Steel-braided fuel line
• 3/8-inch billet fitting
• 4-foot custom extension harness
• CAN LED silicone cover
• Super Lube® included
• Designed for E85 and ethanol fuel blends
• Approximately 30-minute installation

Monitor Your Fuel with BMS CANFlex

The Burger Tuning BMS CANFlex Flex Fuel Ethanol Content Sensor Kit gives Hyundai Elantra N and Veloster N owners a practical way to monitor ethanol content in real time.

By combining a genuine Continental ethanol sensor with Bluetooth connectivity, CANbus integration, an integrated display, and compatibility with supported JB4 systems, the CANFlex provides multiple ways to access fuel-composition data.

For enthusiasts running E85 or changing between different ethanol blends, having accurate information about the fuel in the tank can make the tuning setup easier to understand and monitor.

With the necessary sensor, fittings, fuel line, wiring, and accessories included, the BMS CANFlex provides a complete flex fuel monitoring solution for compatible Hyundai 2.0T N-platform vehicles: https://x-ph.com/burger-tuning-bms-canflex-hyundai-elantra-veloster-n-2-0t-flex-fuel-ethanol-content-sensor-for-e85-fuel-monitoring/