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Home >> BMW >> 2016 >> 535i GT >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair >> Control Unit Box >> 12 90... Removing and installing/replacing electronics box add-on
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12 90... Removing and installing/replacing electronics box add-on

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 Rivets And Cover
G09875359Courtesy of BMW OF NORTH AMERICA, INC.

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
G09875360Courtesy 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).

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
G09875361Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 12 90 2AZ .

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