12 14 550 Replacing control unit (Digital Motor Electronics) (N62)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.

Switch off ignition.

Follow instructions for disconnecting and connecting battery. Refer to 12 00... Instructions for disconnecting and connecting battery .

Disconnect battery.

CAUTION: Follow instructions for removing and installing electronic control units. Refer to 12 00... Instructions for removing and installing electronic control units .

Observe following instructions before replacing control unit:

Program control unit. Refer to 12 14 705 Programming control unit (DME / DDE) .
Code control unit. Refer to 12 14 700 Coding control module (DME / DDE) .

Remove right fresh air duct. Refer to 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH) .

Release screw and remove holder (1).

Fig 1: Removing Cover From Control Unit Box

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws and remove cover (2) from control unit box.

NOTE: Release screws on seal (3) only when removing wiring harness.

Installation:

Insert tabs (1) in openings (2) and close cover.

Fig 2: Inserting Tabs In Openings

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach plug connections on DME control unit (2).

Fig 3: Removing DME Control Unit (PCM)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove DME control unit (2).