Fabspeed XperTune ECU Software for BMW M340i (G20)

Plan a send-in ECU calibration for a supported G20 M340i after checking the B58 control-unit reference and production date. The documented window runs up to the June 2020 ECU-security changeover. Arrange programming availability before removing the ECU, since a later security version can prevent access. Fabspeed Motorsport designs performance exhaust systems, air intakes and ECU tuning in Fort Washington, Pennsylvania. Porsche and other sports-car applications are developed through dyno testing, road evaluation and racetrack work.

Technical Details

• Manufacturer product reference: FS.BMW.M340.ECU.
• Bench service for the original M340i control unit; hardware removal and shipment are required.
• Supply the completed vehicle-information form, including fuel octane and the car’s installed modifications.
• Original-file retention allows a later return to stock; confirm charges for that service and later file revisions.
• Verify the control-unit identifiers and shipment arrangements before leaving the car out of service.
• June 2020 is an ECU-security changeover. Eligibility depends on the exact ECU build and programming access; the calendar month alone is not confirmation.

Use restrictions

Required emissions hardware and diagnostics must continue to operate. Calibration requests that disable them are excluded.

Installation Resources

• ECU programming guide (PDF)

PMB Performance brings over 20 years of parts and fitment experience. Send your VIN, ECU reference, fuel and modifications if you need help confirming the application before ordering.

Fitment & Compatibility