DME engine controller
Coordinates the petrol engine’s fuel, ignition and other control functions.
In a protected electronics location; exact packaging varies.
Software compares requested torque and operating conditions, then commands supported engine systems.
The engine’s conductor reading sensors and directing actuators.
An engine warning rarely identifies a failed controller by itself; power, grounds and signals come first.
Batteries and connections depend on age, charging and usage. Control units are diagnosed by faults, power and communications.
A fuse or connection differs from a coded controller. Identify the cause before replacing an expensive electronic module.
BMW uses DME for petrol engine management; diesel management is commonly called DDE.
BMW low-voltage systems across combustion, hybrid and electric models; equipment varies.