Necessary preliminary work

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Switch off ignition.
Clamp off 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) .

Replacement:

Carry out programming/encoding

IMPORTANT: It is absolutely essential to read out the fault memory with the BMW diagnosis system (BMW specific tool) 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: Unlocking Locks

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and remove.

Release grommet (2) from electronics box.

Installation note:

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

Unlock control unit (3) and raise slightly.

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove control unit (2).

Installation note:

Replacement:

Note control unit identification number and encoding.

Fig 3: Unlocking Connectors

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault messages.

Delete fault memory.