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Home >> BMW >> 2009 >> 528i Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair >> Control Unit Box >> 12 90... Removing and installing/replacing electronics box
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12 90... Removing and installing/replacing electronics box

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .
NOTE: Follow instructions for removing and installing electronic control units

Necessary preliminary tasks: 

Release screws (arrows) behind sound insulation.

Disconnect wiring harness on engine compartment side on right.

Remove electronics box.

Fig 1: Identifying Electronics Box Screws
G04740387Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Make sure gasket (1) is correctly seated on electronics box.

Read fault memory.

Fig 2: Identifying Gasket
G04740388Courtesy of BMW OF NORTH AMERICA, INC.