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Home >> BMW >> 2006 >> X3 Standard >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair (M54) >> Engine Control Unit Box >> 12 90 100 Replacing fan for electronics box

12 90 100 Replacing fan for electronics box

Unfasten screws.

Open electronics box cover (1).

Release relay plug on reverse side of cover.

Remove cover.

Installation: 

Make sure that cover is correctly inserted in hinges of electronics box lower section (watertightness).

Fig 1: Identifying Electronics Box Cover
G04748555Courtesy of BMW OF NORTH AMERICA, INC.

Raise control unit slightly.

Unlock plug connection (1) and detach from equipment carrier.

Unfasten plug connection and disconnect.

Fig 2: Identifying Plug Connection
G04748572Courtesy of BMW OF NORTH AMERICA, INC.

Lever out expander rivet.

Release screws (1).

Remove cover (2).

Fig 3: Identifying Screws & Cover
G04748573Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screws.

Remove fan (1).

Fig 4: Locating Engine Control Unit Fan, Cable Tie, And Screws
G04748574Courtesy of BMW OF NORTH AMERICA, INC.