12 14 550 Replacing control unit (DME) (N55): Replacement

Carry out programming/encoding
If no data can be read out from the previous control unit, carry out injection quantity compensation (description at end of instructions).

IMPORTANT: It is absolutely essential to read out the fault memory with the BMW diagnosis system and to create a fault memory printout.

Switch off ignition.

Release screws (1).

Tightening torque 12 14 2AZ .

Fig 1: Identifying Control Unit Cover Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 12 14 1AZ .

Remove control unit from intake plenum.

Installation note:

Renew gasket between intake plenum and control unit.

Fig 2: Identifying Control Unit And Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.