12 90... Removing and installing/replacing electronics box (N54 - Version 1)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

NOTE: Follow instructions for REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS

Necessary preliminary tasks

Release screws (1).

Slacken nut (2).

Lift out right heater end plate (3).

Installation:

Ensure gasket (4) is correctly seated.

Fig 1: Lifting Out Right Heater End Plate

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 Fasteners

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 equipment carrier (6).

Installation:

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

Fig 3: Pulling Wiring Harness Grommet Out Of Electronics Box

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: Pressing Locking Tabs

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 And 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

Courtesy of BMW OF NORTH AMERICA, INC.