Dorch Engineering B58 Flex Fuel ECA - 100% Plug and Play!

Now that Gen1 B58 tuning software supports true CAN-based Flex Fuel tuning, we are offering our own plug and play ECA solution. With MHD and BM3’s new features, there is no longer much of a need for Bluetooth ethanol sensors. With a CAN-based ethanol sensor, the user can not only monitor ethanol content, but this sensor will also directly communicate with the DME for true Flex Fuel operation! With a Flex Fuel tune, the DME will automatically adjust the tune from a high powered E85 map all the way to a pump gas map and everything in between. This all happens on the fly, based on the live CAN-communication with our ethanol sensor. Gone are the days of doing math at the gas pump only to decide which map to flash and how many gallons of ethanol to mix!

Kit Contents:

• Zeitronix ECA-CAN Module
• Custom PTFE Hose Set (for Dorch HPFP fitment)
• Dorch Plug-n-Play ECA Harness
• Genuine Continental Ethanol Sensor
• Pre-cut Firewall Grommet
• Mounting Accessories

Kit Fitment:

For all vehicles below equipped with a Dorch HPFP:

F20/21 – 140i, 140xi F22/23 – 240i, 240xi F30/31/34 – 340i, 340xi F32/33/36 – 440i, 440xi

G30/31 – 540i, 540xi * G32 – 640i, 640xi * G11/12 – 740i, 740xi *

G01 – X3 m40i * G02 – X4 m40i *

*** ONLY UP TO 2019 Model Year KIT NOT COMPATIBLE with 2020+ B58 Vehicles**

NOTE: For all customers who already have ECA hose/sensor sets, we also offer an “electronics only” package to get you updated to a CAN-ECA. This package will also fit nearly any other custom setup that houses a Continental ethanol sensor in a similar engine bay position. Please contact

• Orders ship from Dallas, TX in 1–2 business days.
• Free US shipping on orders over $250.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.