MHD FlexFuel Kit (Automatic) – BMW F-Series B48 / B58 / N55 / S55

OVERVIEW

The MHD FlexFuel Kit for F Series cars with an automatic or DCT transmission enables the FlexFuel feature on MHD and EcuTek tuned vehicles. It covers the F Series B48, B58, N55 and S55 engines.

A CAN Ethanol Content Analyzer (ECA) reads the signal from the E85 sensor, converts it to CAN format and sends it to the engine computer (DME). E85 is a fuel with a high octane rating; the FlexFuel feature is the tuning function that adjusts the tune on the fly to the ethanol content the ECA reports in the tank. Without the correct tune for the blend in the tank the engine will not run correctly and can be damaged.

Installation is straightforward with no wires to splice or solder. The kit is plug-and-play including connectors and fuel fittings, and every unit is tested before it ships.

SPECS

• Enables the FlexFuel feature on MHD and EcuTek tuned cars
• CAN Ethanol Content Analyzer: reads the E85 sensor and converts the signal to CAN for the DME
• Coverage: F Series B48 / B58 / N55 / S55 cars with an automatic transmission or DCT — see Vehicle Applications
• Plug-and-play installation — no wire splicing or soldering
• Includes the connectors and fuel fittings needed for the install
• Custom Precision Raceworks PR360 plug-and-play fuel fittings
• Every unit is bench tested before shipping

PARTS INCLUDED

• Ethanol Analyzer Module
• Ethanol Sensor
• Custom plug-and-play piggyback harness
• Custom plug-and-play Precision Raceworks PR360 fittings
• Eye protection glasses
• Hand protection gloves

TECH RESOURCES

Additional Parts Required

• Active MHD Flasher Super License with FlexFuel maps (or an EcuTek tune with FlexFuel enabled). The kit supplies the ethanol reading; the tune does the work. Matching MHD Super License: B58, N55 F-Series, S55.
• MHD Universal WIFI Adapter or another supported MHD interface, needed to flash the FlexFuel-enabled map to the car.
• E85 or an ethanol blend available at the pump.

Installation

• MHD FlexFuel Kit – F-Series N55 / S55 (AT / DCT) install video
• MHD FlexFuel Kit – F-Series B58 install video
• PR360 fuel fitting lock and check procedure (PDF): PR360 Fitting Lock Guide
• How to enable the FlexFuel feature in the MHD app (video)
• Setup, flashing, datalogging and return-to-stock: Speed Logic MHD Tuning Guide
• Request an Install Appointment

Notes

• Automatic / DCT transmissions only — manual cars use the MHD FlexFuel Kit (Open Wire).
• Requires an MHD or EcuTek tune with FlexFuel enabled.
• For off-road use only.
• Not sure? Send us your VIN and we'll confirm fitment before you order.
• Part Number: MHD-ECA-F-AT

VEHICLE APPLICATIONS

Years are US model years. Confirm your exact model and build date with Speed Logic by VIN before ordering.