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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: 

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 Rivet And Cover
G06889587Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque: see 4AZ in 12 90 ELECTRONICS BOX, WIRING HARNESS .

Release clamp (2).

Remove cover (3) from supplementary electronics box.

Fig 2: Identifying Supplementary Electronics Box Cover, Clamp And Screws
G06888952Courtesy of BMW OF NORTH AMERICA, INC.

Unclip grommet hold-down device (1).

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

Installation note: 

Make sure grommets are correctly seated (watertightness).

Fig 3: Identifying Supplementary Electronics Box, Carrier Plate, Screws, Rubber Grommets And Grommet Hold-Down Device
G06888953Courtesy of BMW OF NORTH AMERICA, INC.

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

Release screw (4).

Tightening torque: see 2AZ in 12 90 ELECTRONICS BOX, WIRING HARNESS .

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