Dorch Flex Fuel Ethanol Sensor (ECA) Kit - S58 M2 / M3 / M4

Flex fuel lets the engine computer read the ethanol content of what's in the tank and blend the tune from pump gas to E85 on the fly. You don't have to work out mixes at the pump or reflash between maps. Dorch's S58 kit puts a genuine Continental ethanol sensor on the CAN bus, so it talks to the DME directly instead of through a Bluetooth sensor.

What you get

• Zeitronix ECA-CAN module and a genuine Continental ethanol sensor.
• Dorch plug-and-play harness that ties into the factory wiring: no cutting and no wire taps.
• Custom PTFE hose set, a pre-cut firewall grommet and mounting parts.

Good to know

• Everything tucks under the factory insulation and engine covers, and the kit is fully reversible.
• Dorch puts install time at about 1 hour.
• Flex fuel needs a tune that supports it.
• Fits the BMW M2 (G87), M3 (G80) and M4 (G82). Dorch doesn't list the X3 M or X4 M.

Brand: Dorch Engineering · Part #: DE-58-ECA-M34

• Ships from the brand or distributor, usually in 3–7 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.