12 90 100 Replacing fan for electronics box (N52)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. 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) .

Necessary preliminary tasks:

Switch off ignition
Disconnect BATTERY NEGATIVE TERMINAL
Remove right MICROFILTER HOUSING
Remove AIRBAG CONTROL UNIT

IMPORTANT: Follow instructions for REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS .

Unlock cover (1) with slide (3).

Unfasten screws (2).

Remove electronics box cover (1).

Installation:

Engage electronics box cover (1) correctly in hinges.

Security version:

Remove DME armor plating.

Fig 1: Identifying Electronics Box Cover, Slide And Screws

G05501953

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connections (1 to 6).

Remove DME control unit.

Fig 2: Identifying Plug Connections

G05501954

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug connection (1) on fan for electronics box and disconnect.

Release screws (2) on device carrier.

Lift out device carrier (2).

Fig 3: Identifying Screws And Device Carrier

G05501955

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock vent duct (1) and remove in direction of arrow.

Remove cover (2) in direction of arrow.

Fig 4: Removing Cover And Vent Duct

G05501956

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts.

Pull device holder (1) approx. 3 cm towards rear.

Fig 5: Identifying Device Holder With Nuts

G05501957

Courtesy of BMW OF NORTH AMERICA, INC.

Remove air duct (1) from device holder (2).

Fig 6: Removing Air Duct Of Device Holder

G05501958

Courtesy of BMW OF NORTH AMERICA, INC.

Turn connecting piece (1) to right and remove.

Fig 7: Turning Connecting Piece

G05501959

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws and remove fan (1) in upwards direction.

Fig 8: Identifying Fan With Screws

G05501960

Courtesy of BMW OF NORTH AMERICA, INC.

Check function of DME.