With the introduction of true CAN-based Flex Fuel tuning for the BMW S58 engine, Dorch Engineering proudly presents its Plug & Play ECA (Ethanol Content Analyzer) Kit.

Thanks to the latest MHD and Bootmod3 (BM3) software updates, Bluetooth ethanol sensors have become a thing of the past.
The CANbus-based ethanol sensor not only measures ethanol content but also communicates directly with the DME, enabling full Flex Fuel capability.

With proper Flex Fuel software, the DME automatically adjusts the engine map — from maximum output on E85 to regular pump gas and everything in between.
This happens dynamically and in real time, thanks to CAN communication with the Dorch ethanol sensor.
No more fuel ratio guessing, no more switching maps — just fuel up and drive.

NO CUTTING, NO SPLICING – 100% PLUG & PLAY

The kit is completely reversible and fully Plug & Play.
The harness integrates seamlessly with the OEM wiring, and all components are neatly routed, allowing you to retain all factory engine covers and insulation panels.

By placing the ethanol sensor as close to the injectors as possible, the system delivers virtually zero delay in reading the actual ethanol blend reaching the combustion chamber.

Installation takes about 30 minutes alongside an HPFP install, or roughly 1 hour as a standalone operation, depending on experience.

KIT CONTENTS

• Zeitronix ECA-CAN Module

• Dedicated PTFE Fuel Line Set

• Dorch Engineering Plug & Play ECA Harness

• Genuine Continental Ethanol Sensor

• Pre-cut Firewall Pass-through

• Mounting Accessories

APPLICATIONS

• BMW G80 M3 (2021+)

• BMW G80 M3 Competition (2021+)

• BMW G81 M3 Touring (2023+)

• BMW G81 M3 Competition Touring (2023+)

• BMW G82 M4 Coupe (2021+)

• BMW G82 M4 Competition Coupe (2021+)

• BMW G83 M4 Convertible (2021+)

• BMW G83 M4 Competition Convertible (2021+)

• BMW G87 M2 Coupe (2023+)

• BMW F97 X3M

• BMW F98 X4M