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Home >> BMW >> 2017 >> M3 Automatic DCT Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Parking Brake System >> Brakes - Repair (F80) >> 34 52 Electronic Components >> 34 52 121 Removing and installing/replacing ICM control unit

34 52 121 Removing and installing/replacing ICM control unit

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 work: 

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

Disconnect plug connection (1).

Release nuts (2) and remove ICM control unit (3).

Installation note: 

Replace self-locking nuts.

Tightening torque: 34 51 2AZ .

IMPORTANT: Do not trap any electrical wires when installing ICM control unit!
G10095937Courtesy of BMW OF NORTH AMERICA, INC.

After removing and installing ICM control unit: 

After completing repairs, use BMW Diagnosis and Information System to

Replacement: 

After completing repairs, use BMW Diagnosis and Information System to