12 14 550 Replacing control unit (DME)

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2008 BMW Z4, 2008 BMW 328xi, 2008 BMW 328i, 2008 BMW 323i, and 2007 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Switch off ignition
Disconnect Battery
Remove Microfilter Housing
Follow Instructions For Removing And Installing Control Units

IMPORTANT: Read and comply with Notes On Protection Against Electrostatic Damage (ESD Protection) .

Replacement:

IMPORTANT: It is absolutely essential to read out the fault memory with the MoDiC or the BMW DIS and to create a fault memory printout.

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Identifying Control Unit Fasteners, Lock And Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Unlock control unit (2) and remove towards top.

Installation:

Replacement:

Note device identification number and coding.

Fig 2: Identifying Plug And Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault messages.

Now clear the fault memory.

Necessary preliminary tasks:

Switch off ignition
Disconnect Battery
Remove Microfilter Housing

IMPORTANT: Follow Instructions For Removing And Installing Control Units

IMPORTANT: Read and comply with Notes On Protection Against Electrostatic Damage (ESD Protection) notes on protection against electrostatic damage (ESD protection).

Replacement:

Carry out programming/coding

IMPORTANT: It is absolutely essential to read out the fault memory with the MoDiC or the BMW DIS and to create a fault memory printout.

Switch off ignition.

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Identifying Control Unit Fasteners, Locks And Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Release grommet (2) from electronics box.

Installation:

Make sure grommet (2) is correctly seated in housing (water tightness).

Unlock control unit (3) and raise slightly.

Fig 2: Identifying Plug, Electronics Box Grommet And Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plugs (1) using slide in direction of arrow and remove.

Remove control unit (2).

Installation:

Replacement:

Note device identification number and coding.

Fig 3: Removing Plugs And Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault messages.

Now clear the fault memory.