12 90... Removing and installing/replacing electronics box add-on

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IMPORTANT: Comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

NOTE: Follow notes for removing and installing control units.

Necessary preliminary tasks

Read fault memory.
Disconnect NEGATIVE BATTERY CABLE .

Release expanding rivet (1) and remove cover (2).

Installation note:

Replace damaged expanding rivet.

Holder of cover (2) must snap into place in suspension cross-brace during installation.

Fig 1: Identifying Expanding Rivets And Cover

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Release screws (1).

Tightening torque 12 90 4AZ .

Release clamp (2).

Remove cover (3) from supplementary electronics box.

Fig 2: Identifying Screws, Clamp And Lid

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Unclip grommet hold-down device (1).

Detach rubber grommets (2) from electronics box add-on.

Installation note:

Make sure grommets are correctly seated (watertightness).

Release carrier plate (3) from lower section of supplementary electronics box (5) and set aside.

Release screw (4).

Fig 3: Identifying Rubber Grommets, Grommet Hold-Down Device, Carrier Plate, Screw, And Electronics Box

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 12 90 2AZ .

Remove the lower section of the supplementary electronics box (5).