12 90 ... Removing and Installing/Replacing Electronics Box

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection). (See 61 35 ... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) and 61 35 ... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) )

NOTE: Follow instructions for removing and installing electronic control units (See 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS and/or 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS )

Necessary preliminary tasks:

Read fault memory.
Disconnect negative battery cable (See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD and/or 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD )
Remove both windscreen wiper arms (See 61 61 100 REMOVING AND INSTALLING/REPLACING BOTH WINDSCREEN WIPER ARMS and/or 61 61 100 REMOVING AND INSTALLING/REPLACING BOTH WINDSCREEN WIPER ARMS )
Remove microfilter housing (See 64 31 092 REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING (LOWER SECTION) and/or 64 31 092 REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING (LOWER SECTION) )
Remove cowl panel cover (See 51 13 116 REMOVING AND INSTALLING COWL PANEL COVER and/or 51 13 116 REMOVING AND INSTALLING COWL PANEL COVER )
Remove tension strut on spring strut dome on right (See 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME and/or 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME )

Release screws (1).

Slacken nut (2).

Lift out right end panel (3).

Installation:

Ensure gasket (4) is correctly seated.

Fig 1: Lifting Out Right End Panel

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 2: Removing Cover

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Lift out plug connection (2), fuse carrier (3) and wiring harness grommet (4) from electronics box (1).

Installation:

Make sure wiring harness grommets (4) are correctly seated in electronics box (1).

Fig 3: Identifying Wiring Harness Grommets

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock DME control unit at holders (1) and raise slightly.

Pull tab (3) in direction of arrow out of housing and disconnect plug connections (2) on DME control unit.

Fig 4: Pulling Tab Disconnecting Plug Connections On DME Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 5: Pulling Contact Carrier Out Of Housing

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 6: Pressing Locking Tab

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Unlock control unit carrier (2) at holder (1) and remove.

Remove DME control unit (3).

Fig 7: Removing DME Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock control unit carrier (2) at holder (1) and remove.

Fig 8: Identifying Control Unit Carrier & Holder

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Remove control unit carrier (1) from electronics box.

Fig 9: Identifying Control Unit Carrier From Electronics Box

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Release screws (1).

Replacement:

Modify water drain valve (2) and bump stop (3).

Fig 10: Identifying Water Drain Valve & Bump Stop

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Fig 11: Identifying Electronics Box Gasket

Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks:

Read fault memory.
Disconnect negative battery cable (See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD and/or 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD )
Remove both windscreen wiper arms (See 61 61 100 REMOVING AND INSTALLING/REPLACING BOTH WINDSCREEN WIPER ARMS and/or 61 61 100 REMOVING AND INSTALLING/REPLACING BOTH WINDSCREEN WIPER ARMS )
Remove microfilter housing (See 64 31 092 REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING (LOWER SECTION) and/or 64 31 092 REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING (LOWER SECTION) )
Remove cowl panel cover (See 51 13 116 REMOVING AND INSTALLING COWL PANEL COVER and/or 51 13 116 REMOVING AND INSTALLING COWL PANEL COVER )
Remove tension strut on spring strut dome on right (See 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME and/or 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME )

Release screws (1).

Slacken nut (2).

Lift out right end panel (3).

Installation:

Ensure gasket (4) is correctly seated.

Fig 1: Lifting Out Right End Panel

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 2: Removing Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Unlock plug connection (2) in direction of arrow and disconnect.

Pull wiring harness grommet (5) out of electronics box and remove wiring harness (4).

Pull wiring harness grommet (3) out of electronics box and remove wiring harness with control unit carrier (6).

Installation:

Make sure wiring harness grommets (3, 5) are correctly seated in electronics box.

Fig 3: Identifying Wiring Harness Grommets

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 4: Pulling Contact Carrier Out Of Housing

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 5: Pulling Contact Carrier Out Of Housing

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Replacement:

Modify water drain valve (2) and bump stop (3).

Fig 6: Identifying Water Drain Valve & Bump Stop

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Fig 7: Identifying Electronics Box Gasket

Courtesy of BMW OF NORTH AMERICA, INC.