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12 51 001 Replacing Wiring Harness Section For Engine (N73)

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Necessary Preliminary Tasks: 

Unfasten Following Plug Connections: 

Fig 1: Identifying Wiring Harness Components (Items 1-12)
G03292205Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 2: Identifying Wiring Harness Components (Items 13-24)
G03292206Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Identifying Wiring Harness Components (Items 25-36)
G03292207Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 4: Identifying Wiring Harness Components (Items 37-41)
G03292208Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Release screws (1).

Release retaining clip (2).

Remove cover (3).

Installation: 

Fit profile seals correctly.

Check for water leaks.

Fig 5: Locating Retaining Screws For Cover
G03292209Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Plug assignment in equipment carrier:

Control unit (1) VVT.

Control unit (2) DME. (plug color black).

Control unit (3) DME 2 (plug color gray).

Control unit (4) IVM (integrated supply module).

Control unit (5) HDEV 2 (high-pressure fuel injection control unit 7 to 12). (cable color red).

Control unit (6) HDEV (high-pressure fuel injection control unit 1 to 6). (cable color black).

Assemble engine.

NOTE: Check function of DMC.
Fig 6: Identifying Control Unit Plugs
G03292210Courtesy of BMW OF NORTH AMERICA, INC.