34 52 121 Removing and installing/renewing ICM control unit

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

WARNING: The sensor system for triggering the airbag is installed in the ICM control unit.
The battery must be disconnected before removing the ICM control unit (ICM control unit de-energized).
There is a risk of the airbag being triggered inadvertently if this requirement is disregarded.

Necessary preliminary tasks:

Disconnect NEGATIVE BATTERY CABLE .
Remove CENTER CONSOLE assembly.

WARNING: Make sure that the negative battery lead is disconnected.
There is a risk of the airbag being triggered inadvertently.

Undo nuts (1) and raise ICM control unit (2).

Release plug connection (3) and remove ICM control unit (2).

Installation note:

Replace self-locking nuts.

Tightening torque 34 51 2AZ .

IMPORTANT: Do not trap any electrical wires when installing ICM control unit.

Fig 1: Identifying ICM Control Unit, Plug Connection And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

After removing and installing ICM control unit:

After the repair work has been completed with the diagnosis system:

carry out ADJUSTMENT/START-UP OF ICM CONTROL UNIT

After replacement of the ICM control unit:

Vehicles built before 03/2012:

Perform "Conversion replacement ICM" (vehicle order is changed)
Accept action plan with the control units to be programmed/encoded and, if necessary, enabled.
Note the reworking list:
Carry out ADJUSTMENT/START-UP OF ICM CONTROL UNIT

Carry out RIDE HEIGHT ADJUSTMENT

On vehicles from 03/2012:

After completing repairs, use BMW Diagnosis and Information System to