12 90 100 Replacing fan for electronics box

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Switch off ignition.
Follow instructions for Disconnecting and connecting battery. See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
Disconnect battery ground terminal.
Detach fuse box in passenger compartment and pull back; to do so, refer to 61 13 050 REMOVING AND INSTALLING OR REPLACING FUSE BOX IN PASSENGER COMPARTMENT (BUILT AFTER 03/2007) (E82) or 61 13 050 REMOVING AND INSTALLING OR REPLACING FUSE BOX IN PASSENGER COMPARTMENT (BUILT AFTER 03/2007) (E88) .

IMPORTANT: Follow instructions for removing and installing electronic control units .

Pull back carpet.

Release lower nut on fuse carrier holder.

Pull holder slightly towards front.

Fig 1: Locating Lower Nut On Fuse Carrier Holder

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Disconnect plug connections for fan motor (1).

Release screws (2). Remove fan.

Fig 2: Identifying Plug Connections On Fan Motor

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Add final details to vehicle.

Read fault memory.