12 51 001 Replacing wiring harness section for engine (N62)

Necessary Preliminary Tasks: 

• Read out DME fault memory
• Disconnect battery negative lead. Refer to 61 21 010 REMOVING AND INSTALLING BATTERY .
• Engine bonnet/hood in assembly position. Refer to 51 00 ... SERVICE POSITION OF ENGINE HOOD .
• Remove fresh air duct on right and if necessary on left. Refer to 64 31 053 REMOVING AND INSTALLING OR REPLACING FRESH AIR DUCT .
• Remove center of assembly partition wall. Refer to 64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION .
• Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N62) .
• Remove underbody protection at front/rear.
• Remove reinforcement plate.
• Remove electric fan with fan cowl. Refer to 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (N62, N62TU) .
• Remove right exhaust manifold.
• Remove starter motor.
• Remove alternator. Refer to 12 31 020 REMOVING AND INSTALLING OR REPLACING ALTERNATOR (N62) .

Release screws (2).

Detach electronics box cover (1) from fixture (3) in direction of arrow towards right.

Installation: 

Secure electronics box cover (1) in direction of arrow on left in fixture (3).

Fig 1: Locating Electronics Box Cover Retaining Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 2: Identifying Plug Connections For Engine Wiring Harness (1 Of 4)

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 3: Identifying Plug Connections For Engine Wiring Harness (2 Of 4)

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 4: Identifying Plug Connections For Engine Wiring Harness (3 Of 4)

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten Following Plug Connections: 

Fig 5: Identifying Plug Connections For Engine Wiring Harness (4 Of 4)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Fit profile seals correctly.

Check for water leaks.

Assemble engine.