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12 14 550 Replacing Control Unit (DME)

Necessary preliminary tasks: 

IMPORTANT: Follow instructions for removing and installing  control units  
IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection)  . See 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) (CONVERTIBLE) or 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) (COUPE) .

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.

Switch off ignition.

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

Unlock locks (2) in direction of arrow.

Remove cover (3).

Version 1 

Fig 1: Locating Fasteners & Locks
G04751288Courtesy 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 (watertightness).

Unlock control unit (3) and raise slightly.

Fig 2: Releasing Grommet From Electronics Box
G04751291Courtesy 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 Control Unit
G05758736Courtesy of BMW OF NORTH AMERICA, INC.

Version 2 

Unlock plug (1) and remove.

Unlock control unit (2) and remove towards top.

Installation:  Replacement: Note device identification number and encoding.

Fig 4: Identifying Plug And Control Unit
G04751289Courtesy of BMW OF NORTH AMERICA, INC.
NOTE:

Check stored fault messages.

Now clear the fault memory.

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