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12 14 550 Replacing control unit (DME)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection) . See 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary tasks:

Read fault memory.
Switch off ignition
Disconnect battery . See 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Remove lower section of microfilter housing on right . See 64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION .

IMPORTANT: Follow instructions for removing and installing electronic control units .

Unlock cover (1) with slide (3).

Release bolts (2).

Remove electronics box cover (1).

Installation:

Engage electronics box cover (1) correctly in hinges.

Security version:

Remove DME armour plating . See 51 71... REMOVING AND INSTALLING/REPLACING ENGINE COMPARTMENT PROTECTIVE FEATURES (SECURITY) .

Fig 1: Identifying Electronics Box Cover, Slide And Bolts

G04740389

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach all plug connections on DME control unit (1).

Unlock DME control unit (1) and remove.

Fig 2: Identifying DME Control Unit

G05476035

Courtesy of BMW OF NORTH AMERICA, INC.

Carry out coding/programming .

NOTE: Read out fault memory of DME control unit.
Check stored fault messages.
Now clear the fault memory.