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ECU may refer to:

Automotive terms[edit]

  • Electronic control unit, a generic term for any embedded system that controls one or more of the electrical systems or subsystems in a motor vehicle
  • Engine control unit, one type of electronic control unit that manages an engine's operation


  • European Currency Unit, a former basket of the currencies of the European Community, precursor to the euro
  • Écu, the name of several French coins