Dorch Flex Fuel Ethanol Sensor (ECA) Kit - Gen 1 B58

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 Gen 1 kit puts a genuine Continental ethanol sensor on the CAN bus, so it talks to the DME directly.

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

• The sensor sits close to the injectors, so the reading matches what's actually being burned.
• Everything tucks under the factory insulation and engine covers, and the kit is fully reversible.
• Dorch puts install time at about 1 hour on its own, or about 30 minutes extra when done with a pump install.
• Pick your chassis group and pump: a Dorch pump, the B58TU (Gen 2) pump used as a Gen 1 upgrade, or an original Dorch DS1/DS2.
• Flex fuel needs a tune that supports it.
• Fits Gen 1 B58 cars through the 2019 model year: M140i, M240i (F22), 340i (F30), 440i (F32), 540i (G30), 640i GT (G32), 740i (G11) and X3/X4 M40i (G01/G02). It does not fit 2020+ (Gen 2) B58 cars.

Brand: Dorch Engineering · Part #: DE-58-ECA, DE-581-ECA-14, DE-581-ECA-14TU, DE-581-ECA-14OG, DE-581-ECA-57, DE-581-ECA-57TU, DE-581-ECA-57OG, DE-581-ECA-X34, DE-581-ECA-X34TU, DE-581-ECA-X34OG

• Ships from the brand or distributor, usually in 3–7 business days.
• Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
• 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.