12 51 001 Replacing wiring harness section for engine (N52)

Necessary preliminary tasks: 

• Read out fault memory of DME control unit
• Switch off ignition
• Follow instructions for disconnecting and connecting battery

  Disconnect battery negative lead from battery and lay to one side

• Remove FRESH AIR DUCT
• Remove intake air manifold
• Remove DME CONTROL UNIT 

E60, E61, E63, E64 only: 

Unlock plug on control unit and disconnect.

Unlock tab (1), pull contact carrier (2) in direction of arrow out of housing.

Fig 1: Identifying Tab And Contact Carrier

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E60, E61, E63, E64 only: 

Unlock slide (2) in bore holes (1) and pull out of housing.

Unlock tab (3), pull contact carrier (4) in direction of arrow out of housing.

Unlock and disconnect all plug connections of engine wiring harness section in electronics box.

Fig 2: Unlocking Tab And Contact Carrier

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E65 only: 

Press release tabs (1) and pull slide (2) in direction of arrow out of housing.

Fig 3: Pressing Release Tabs

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E65 only: 

Press release tabs (1) in direction of arrow and pull contact carrier (2) in direction of arrow out of housing.

Unlock and disconnect all plug connections of engine wiring harness section in electronics box.

Fig 4: Pressing Release Tabs

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Release screws and remove holder (1).

Tightening torque 12 52 1AZ .

Fig 5: Identifying Holder And Screws

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