12 90 100 Replacing Fan For Electronics Box (N52)

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) .

Release screw and remove holder (1).

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

Fig 1: Identifying Holder, Cover And Seal

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Installation: 

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

Fig 2: Identifying Tabs

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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

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

Fig 4: Pulling Slide Out Of Housing

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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

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Unlock and disconnect fuse carrier (1).

Unlock plug (2).

Fig 6: Identifying Fuse Carrier And Plug

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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

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

Release screws and remove device holder (2).

Fig 8: Identifying Plug And Device Holder

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Unfasten screws.

Remove fan (1) for electronics box.

Fig 9: Identifying Fan For Electronics Box

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Check stored fault messages.

Now clear the fault memory.