12 90 100 Replacing Fan For Electronics Box (N52)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection). See 61 35 ... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary tasks:

Read and print out fault memory with MoDiC or BMW DIS
Switch off ignition
Follow instructions for disconnecting and connecting battery . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Disconnect battery.
Remove right microfilter air duct . See 64 31 030 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER AIR DUCT (AUTOMATIC A/C BASIC) or 64 31 031 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER AIR DUCT (AUTOMATIC A/C HIGH) .

IMPORTANT: Follow instructions for removing and installing electronic control units. See 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS .

Release screw and remove holder (1).

Release screws and remove cover (2) from electronics box.

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

Fig 1: Identifying Holder, Cover And Seal

G04740311

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Fig 2: Identifying Tabs

G04740312

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect holder (1).

Unlock control unit (2) and pull out of device holder.

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

Fig 3: Identifying Holder And Control Unit

G04777973

Courtesy of BMW OF NORTH AMERICA, INC.

Press release tabs (1) and pull slide (2) in direction of arrow out of housing.

Fig 4: Pulling Slide Out Of Housing

G04777974

Courtesy of BMW OF NORTH AMERICA, INC.

Press release tabs (1) in direction of arrow and pull contact carrier (2) in direction of arrow out of housing.

Fig 5: Pulling Contact Carrier Out Of Housing

G04777975

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect fuse carrier (1).

Unlock plug (2).

Fig 6: Identifying Fuse Carrier And Plug

G04777976

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect relay carriers (1 and 2).

Unlock plug (3) and remove.

Lift out device holder (4).

Fig 7: Identifying Relay Carriers, Plug And Device Holder

G04777977

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach plug (1) on device holder (2).

Release screws and remove device holder (2).

Fig 8: Identifying Plug And Device Holder

G04777978

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screws.

Remove fan (1) for electronics box.

Fig 9: Identifying Fan For Electronics Box

G04773960

Courtesy of BMW OF NORTH AMERICA, INC.

Check stored fault messages.

Now clear the fault memory.